Malicious PDF — malware analysis report

Static analysis result for SHA-256 517087872d5f0c76…

MALICIOUS

PDF

85.8 KB Created: 2021-07-07 00:15:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 6eecc18292d2c535b0fc32b9dcf39820 SHA-1: aa8c7784409e611c22ee93d59ddc4b3588b4864b SHA-256: 517087872d5f0c769b1db437ec77a145cfc594dfce74f8d62870d4dee7538cca
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to compromised websites, suggesting an attempt to redirect users to malicious content or downloads. The presence of a 'download button' lure further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e4c571e586d---22307064079.pdf In PDF document text
    • http://goldenbaycruisesagent.com/userfiles/file/49512067352.pdfIn PDF document text
    • http://oreade-breche.fr/userfiles/file/76388814098.pdfIn PDF document text
    • http://chanakyaaerospacedefence.com/userfiles/file/85570271480.pdfIn PDF document text
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607266f1c94e2---nopogisofobid.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d07690f500---bisejiwor.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/23c9f62fcf1b664bafc609eb70545933/68022061557.pdfIn PDF document text
    • http://popnmusic.fr/userfiles/file/22025843329.pdfIn PDF document text
    • https://tecnibat.net/uploads/archivos/88469339622.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/c72b8d9798bae3754228dd0d7c8fd590/dalamadivozofak.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16075964a090c6---tatubanepixuv.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a3c17a7410---bixizipawadixuv.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/0lmi7mic7k6ujr4a51atfuovol/dudizajivovumomiva.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/b76117e05c2f7bce098b972f7800f1d4/zarogaduvateva.pdfIn PDF document text
    • https://kueapem.com/contents//files/79304473035.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b002a00e0d---zisufudevowejokumejeb.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160aa5f1572010---46497302717.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7e00930cd---nagul.pdfIn PDF document text
    • https://areicon.com/images/file/64123614933.pdfIn PDF document text
    • http://pizzeria-millemiglia.de/app/webroot/img/editor/file/42533344802.pdfIn PDF document text
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/d7f4d7c6ab9e9b7398ed704dffb5b93d/kejamavazif.pdfIn PDF document text
    • http://anatolianlgs.com/userfiles/file/nedesidodilejamub.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-5-12/20210512105905433020.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=the+hate+u+give+questions+pdfPDF 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_off0000ec80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC80 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010492.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10492 17208 bytes
SHA-256: ffaa4371d57b7dbee013c0a7dd7b2963a52949482d622d08b9ee006c6ce525c2
font_02_sfnt_off00013147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13147 10908 bytes
SHA-256: 7872fde32cd5c8be1f59679d2a750d80998bd5a3b5a850ac2c1f397d5f14f22d