Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc0dad5d8530f4eb…

MALICIOUS

PDF

81.5 KB Created: 2021-09-06 07:48:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 2de54e014e5f4833a6e86c3372681fef SHA-1: c32b2d3767f3e8bee80376880f9cc2e0bc7e2363 SHA-256: bc0dad5d8530f4eb3604bec10cdd49e3b23736a6e1e5f8a61e9d966af2be9adf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF sample was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links to external websites, many hosted on compromised WordPress sites or disposable domains, suggesting a phishing or credential harvesting campaign. The presence of embedded URLs and the overall structure indicate an attempt to redirect users to malicious sites, likely for phishing purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • 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.
  • 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 https://smidgel.ru/uplcv?utm_term=tnpsc+group+1+mains+question+paper+2017+pdf PDF link annotation
    • https://petribax.nl/userfiles/file/tivojobivadegujeseb.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4d07a8d7fc---68436479593.pdfIn PDF document text
    • http://siamsankyo.com/Uploads/file/84403336163.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/qogaamgcr4r5k0vard1ckdmhts/40607559304.pdfIn PDF document text
    • https://commonwealthsportsawards.com/userfiles/file/fogogatowofitar.pdfIn PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/0042c7b8ba3d8124021faae10f73a010/remesomegenolab.pdfIn PDF document text
    • https://glycocalyx.nl/userfiles/image/file/16659469930.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b850a02d4c7---46862773252.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/19381dd9beef642d863d4322c29f7833/54511039533.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8a5b8b6b3a---rokusudegetenofas.pdfIn PDF document text
    • http://debschoen.com/userfiles/file/64714304050.pdfIn PDF document text
    • http://ancient-theater.gr/media/file/lakikabikilenal.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/07npu80i67er725bi3ratlcbas/31323955369.pdfIn PDF document text
    • http://zjqzzx.com/uploadfile/file/2021061122590773499.pdfIn PDF document text
    • https://tonitomov.com/picture/file/bukiguzuj.pdfIn PDF document text
    • http://mulroyenvironmental.ie/userfiles/file/20938645400.pdfIn PDF document text
    • https://cochleartudaskozpont.hufiles/76943183046.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/f08050adf13562dfb2fd00e3f34b47d3/21869842979.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/a9bca588cce5ec145a4c38956c7fca94/mamejejomel.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/99598bf6faa15d2fdb68ffeea6ce25d2/pezibizewasikorapumobob.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/0ef8rfdsv1gshgcsf8c1c413lu/48256833785.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/161219536baedd---62736667006.pdfIn PDF document text
    • 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_off0000d3fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3FC 18952 bytes
SHA-256: ae0275b34f84dac8eeb47bf5e9911db5833c6f53448e3ee59287a28a7334cd05
font_01_sfnt_off0001053c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1053C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011d53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D53 11468 bytes
SHA-256: ad0e6bfce8f142903472514c6a42d71e9bb74897df1503233916c63f0cf33c30

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