Malicious PDF — malware analysis report

Static analysis result for SHA-256 04908d8c52d44160…

MALICIOUS

PDF

89.5 KB Created: 2021-08-07 19:25:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 2caa69dea30c124d42309b59f5bc3041 SHA-1: 74b0355e27fcda658e94514c8c327567c1e38f1e SHA-256: 04908d8c52d44160e0d521edd8e7829f5bb429134a07fd50978a40199426c678
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document exhibits multiple social engineering lures, including a call-to-action button and a critical MFA/one-time-code harvesting pretext, indicating a phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document also contains numerous links to potentially compromised websites, some of which host PDF files, suggesting a link farm or download lure. No scripts were extracted, but the overall pattern points to a phishing attack designed to steal credentials or session tokens.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://termocity.by/pics/files/84816871315.pdf In PDF document text
    • https://angkalaris.com/contents//files/98557957185.pdfIn PDF document text
    • http://hemeringen.de/ckeditor_ablage/userfiles/files/mivadumenotenowegoxuxan.pdfIn PDF document text
    • http://lacasedescaraibes.fr/file/52444642092.pdfIn PDF document text
    • http://magendans.com/imagefiles/file/xupagoguzokod.pdfIn PDF document text
    • http://mobydick-band.de/fckdata/file/21934445648.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/jhe21538m6k31au96rj5l4j9v2/likaf.pdfIn PDF document text
    • http://ekolojikweb.net/upld/userfiles/file/boful.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16082ab4dd3b6c---lajeruzajozedus.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160cbd3be0a6b6---69650187950.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/a60f75336df61e2ac563c3eb25405219/sokuw.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/c3484df4c24438b8215a56f8bc2a37d0/21800240035.pdfIn PDF document text
    • https://progin.swiss/ckfinder/userfiles/files/lululabidikorilifivutup.pdfIn PDF document text
    • https://xn--80apefbdm9ah5g.xn--p1ai/userfiles/nerefepilosepa.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/16092dc3d59dac---76811006377.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077a170338eb---jumatagewomekesarabelelul.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160993cb6c4485---gegozujofidisadawe.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/9493b1a37e23fbeaec59015a13a32375/83440110060.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/4f560f374e7e1a25a4e84edc37694f15/22627289336.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/e603c200fab8effe8eed8d78e065087b/29796901194.pdfIn PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/45613394a3458a8b20c32e9e8777a961/fojoladebijupotodojus.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/418ec03b6f618dae8f5241dc18c29a56/fapomulifez.pdfIn PDF document text
    • http://sbstroy53.ru/img/files/21244922384.pdfIn PDF document text
    • http://ineke-ott.nl/keramiek-beelden-imagesfile/65342376483.pdfIn PDF document text
    • http://goodwill.pl/userfiles/file/jarokowubejes.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=how+to+download+minecraft+java+edition+for+free+on+pcPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f827.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF827 10884 bytes
SHA-256: a97b0a8046b973e5939acf8997f4743161c9367d5b40f4bc0ed255778762c83d
font_01_sfnt_off00011135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11135 17392 bytes
SHA-256: 255ae35ccc820f99e82eee219db73b1bf56c40203b3fea3b5ef046235f4b198e
font_02_sfnt_off00013e8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E8D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1