Malicious PDF — malware analysis report

Static analysis result for SHA-256 f30b48ba25cec5ef…

MALICIOUS

PDF

78.7 KB Created: 2021-09-02 14:10:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: ab7e62e990aace6493234be6200e6cd6 SHA-1: 01338531ca0bd95244ffab1be2891e92f788db64 SHA-256: f30b48ba25cec5ef082c9238061638d159268ba946f2751903411c7470a65aa6
164 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, suggesting a link farm designed to host and distribute malicious files. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9758370042---5472224717.pdf In PDF document text
    • http://dolphinegypt.net/userfiles/file/25354306876.pdfIn PDF document text
    • http://shsclassof1959.com/clients/a/a7/a7a82b2a6025f7fafce5d77be70bf845/File/71666261262.pdfIn PDF document text
    • http://realfootball.gr/userfiles/file/44011185065.pdfIn PDF document text
    • http://www.motorradfreunde-toggenburg.ch/up/files/gaxokofujexopobifi.pdfIn PDF document text
    • http://cuspsurgeons.com/userfiles/file/48379472069.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/dd8473eb1327688a9285d37080e2ac90/revevuzewawebugana.pdfIn PDF document text
    • http://sequirk.ie/userfiles/file/71113406141.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad4604664cd---zosipadavoxijuke.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/hns535a8nijem1isolhg6cdtla/kesixavinafafemaxisab.pdfIn PDF document text
    • http://ngnjl.com/userfiles/files/balejaju.pdfIn PDF document text
    • http://mebelhotel.ru/images/news/file/29504548843.pdfIn PDF document text
    • https://aldurra.ly/images-editeur/img/file/suzopegepava.pdfIn PDF document text
    • https://livstyle.ro/home/livstyle/public_html/uploads/files/5761227646.pdfIn PDF document text
    • http://yorktownhs1987.com/clients/57482/File/15099544874.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/lerutazapuvumupati.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/bd1bc8c377fc1aabc8e4a4a1f86e4739/44414877006.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ec4d6983ffb---rikesonunateg.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608601bdbaccf---65588121000.pdfIn PDF document text
    • https://rh4-h1tapi-turbo.com/contents/files/lininerupimimonebodezaru.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/6329dcd1b7cb8360debfba3cb5cc7683/42995061516.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb292adee62---58326200751.pdfIn PDF document text
    • http://bjaimama.com/data/upload/2021/07/file/202107291751524892.pdfIn PDF document text
    • http://chieucoingason.vn/files/67495152205.pdfIn PDF document text
    • http://bjaimama.com/data/upload/2021/07/file/202107312305064529.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=reasoning+book+pdf+in+teluguPDF 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_off0000c501.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC501 10952 bytes
SHA-256: aed60922db67ad02f2e28cfc362f3bc6c5e0bf60010a1d4d22b48fb198ba3a50
font_01_sfnt_off0000de19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE19 21120 bytes
SHA-256: ebc7cf3c69f38191d00b9cb00b899830cafb5370fc9c88376dad59a47d42ca34
font_02_sfnt_off000113b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1