Malicious PDF — malware analysis report

Static analysis result for SHA-256 01f5c78b8f7adf4e…

MALICIOUS

PDF

85.5 KB Created: 2021-07-25 12:03:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: a6097d42ce60f7e8fa6f217ed550cdac SHA-1: 0b41e3e2b6f0003eeb5407fba9f620c20535b8d4 SHA-256: 01f5c78b8f7adf4ea903f157a78267e4209321d1e9ede756393e5cb6350058e7
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised CMS upload directories and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body is heavily obfuscated and unreadable, providing no direct user-facing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160888295f0d24---kamupegonegakefe.pdf In PDF document text
    • https://gulyaskantin.hu/uploads/frontend/files/16461623996.pdfIn PDF document text
    • http://rayanchem.com/d/files/13907811321.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/72b8718e7958e5568abd72ccf2b899ec/serukexomuzamiwoteserutes.pdfIn PDF document text
    • http://jevades.com/aircraft/fckimages/file/pagusadef.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/d37973d202e2a611c54963400e6e3fbc/63930025838.pdfIn PDF document text
    • https://myphi.biz/nbloom/fckuploads/file/deteruvaragixiko.pdfIn PDF document text
    • http://yuanyoujie.vip/userfiles/file/vogodokoduwajezu.pdfIn PDF document text
    • http://amdind.com/userfiles/file/pogusokumikujebiwuri.pdfIn PDF document text
    • http://glina-master.ru/admin/ckfinder/userfiles/files/17082955098.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9042a59fd---7890898940.pdfIn PDF document text
    • http://learningkey.org/userfiles/92802763500.pdfIn PDF document text
    • http://deshdunya.com/blogimage/file/68428120125.pdfIn PDF document text
    • https://kurtwohndesign.ch/userfiles/files/jexofejabudokefupidepa.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16076c76bb8917---difeka.pdfIn PDF document text
    • https://chmelo.hu/sites/default/files/file/witabaserotoripeno.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606effd0821be---jikaf.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/1af74c2bd039453f9059e3c1883159eb/nisizedatuvusi.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/c4adc422baae90e3a40eb1076916bff5/pigejage.pdfIn PDF document text
    • https://medsplus.us/admin/images/file/99198704491.pdfIn PDF document text
    • http://grafichesirio.com/userfiles/files/51855854073.pdfIn PDF document text
    • https://mldom.xyz/web/img/podborky/files/16104693507.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=rational+combi+oven+manual+cleaningPDF 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_off0000eb25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB25 10656 bytes
SHA-256: 3d60d05f4ed2bc55045ad2bef4c8d40dd405eb1c06b3f91eb390753996d9c645
font_01_sfnt_off0001039e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1039E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011bb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BB0 16900 bytes
SHA-256: 2f206cff3a424a3b33e82427df7e85fbbde2a86f28995205d8767f84bd116f2e

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