Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e6b559c779dd1a9…

MALICIOUS

PDF

87.4 KB Created: 2021-04-05 13:12:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ddb8b399921c175581bb3ed256865e4c SHA-1: 9fe6595ecad99981fb28d916ceb3a9116a121de5 SHA-256: 1e6b559c779dd1a973703ebb84cc202be5f7be725cc6a2044746c2846cd8e59c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

The PDF contains a critical heuristic firing for requesting recovery secrets, indicating a phishing or credential harvesting attempt. It also includes numerous external URIs, with one specifically flagged as a link farm on disposable hosting. While no scripts were extracted, the combination of the recovery secret lure and the external links suggests the document's primary purpose is to direct users to malicious sites for fraudulent activities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://druttle.ru/strik?utm_term=skycaddie+linx+watch+user+manual PDF link annotation
    • http://fuxezaboxekave.scienceontheweb.net/nidoginepe.pdfIn PDF document text
    • http://posebakuxosafod.getenjoyment.net/sewodagofezuvusinufe.pdfIn PDF document text
    • http://zogometemo.sportsontheweb.net/how_to_clear_error_code_on_canon_printer.pdfIn PDF document text
    • http://merotudonor.mypressonline.com/63879061694.pdfIn PDF document text
    • http://delinapod.mypressonline.com/virujazasiwixevasawew.pdfIn PDF document text
    • http://tewatag.medianewsonline.com/graco_duetconnect_lx_swing_and_bouncer_instructions.pdfIn PDF document text
    • http://botefedej.sportsontheweb.net/wafez.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4cf6c2b4-cd84-4b73-83b1-bf7f441162b2.filesusr.com/ugd/e50c99_e5f55b7607db4fee83ba8693fcf04a37.pdf?index=trueIn PDF document text
    • http://kofaxafogi.myartsonline.com/business_communication_courses_online_india.pdfIn PDF document text
    • https://87deab66-c645-46c6-955a-dbc2758d34a6.filesusr.com/ugd/302fc9_6d677eef68694ac5b309c93a30247c5d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/49a91122-d3e7-46d8-bb48-80abd0056fdd/79057652003.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ad250c1-74c4-4cff-8479-9bf348b8256d/facebook_recovery_code_not_sending.pdfIn PDF document text
    • https://ff4d9611-e7ea-45f2-85d3-f0b464ef817f.filesusr.com/ugd/48f461_ce980b3211ed4b9bb90af84144969277.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f01201bf-35bb-45ee-a303-ab93a1a3afa4/19553174766.pdfIn PDF document text
    • http://rexefobixavater.myartsonline.com/what_is_the_best_drawing_app_for_windows_10.pdfIn PDF document text
    • http://positajugopisu.myartsonline.com/laundry_symbols_uk.pdfIn PDF document text
    • https://56076a71-1b70-41e8-afe1-d547c394b4ee.filesusr.com/ugd/ab0d05_a86679e187b4486286d3efdd05d6b34e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/55b77160-dc23-4099-9656-34a0ba2057bb/wunas.pdfIn PDF document text
    • http://tevaluzax.atwebpages.com/money_banking_and_finance_english_3rd_edition.pdfIn PDF document text
    • https://0b21792c-a699-4cf4-8833-5910c6ad58af.filesusr.com/ugd/b0b521_f3371344018d47b4bfbff909114b276b.pdf?index=trueIn PDF document text
    • https://c09438b0-f1cf-4ade-afa2-d322e048c450.filesusr.com/ugd/313cc6_6416fc4d5b6c4b1f9d7cb4c27ac599a1.pdf?index=trueIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000114ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114EF 5608 bytes
SHA-256: 4f0279044891de2012ba539348fd6f912374f5c2f4ac76dc0804b7658f71046a
font_01_sfnt_off000127f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127F9 11388 bytes
SHA-256: ea115e0ec2a239d7766582f0185957ead576f28ba1e5cfb8b0e5ab902ba58954