Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0bb279c7223a30c…

MALICIOUS

PDF

89.0 KB Created: 2021-05-14 04:55:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d4cd291f85d21cdb7eeee6726a9254a4 SHA-1: 531772f6eefb16ab691ba0ca58268709291e8c3a SHA-256: e0bb279c7223a30c210120031a5082bbd7a779c7337232c46b81b61f797a405a
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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
  • 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://botokaw.ru/strik?utm_term=how+long+is+a+furnace+warranty PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374839/normal_601976706d5de.pdfIn PDF document text
    • http://tezijexipilimo.getenjoyment.net/jarosex.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393349/normal_5ffa72bc390d1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382405/normal_5ffd63842feeb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449192/normal_5ffcc6a32d083.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390068/normal_600fcc2c84d40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368736/normal_601528656743a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374022/normal_603eb8920a8b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371807/normal_5fea1aec3abe0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414360/normal_606b074840897.pdfIn PDF document text
    • http://mezogevap.mypressonline.com/all_writers_have_more_to_learn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484115/normal_602b7b7f5303f.pdfIn PDF document text
    • http://timinome.getenjoyment.net/edexcel_a_level_physics_revision_notes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://sasukagisodubex.onlinewebshop.net/4093030652.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/nitojuseba.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/14493461283.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5677be82-7dce-4af8-a061-0fe23e3a2475/kamapa.pdfIn PDF document text
    • http://kisalonokexiwi.atwebpages.com/speaking_ielts_practice.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1534d396-cfab-4f90-b388-e536e9ff1032/chrome_flash_player_settings.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a73491a7-b2b1-433a-8de4-bc05e98ae914/duwamular.pdfIn PDF document text
    • https://s3.amazonaws.com/redegelesibif/nadujige.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a398f20c-f5a6-4b5e-88e7-3422b7e2ab75/jegapasatifepam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b74c989-ec14-40b6-8aff-ad4b36b343bd/84537549461.pdfIn PDF document text
    • https://s3.amazonaws.com/xomudufe/42218412963.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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD3E 5088 bytes
SHA-256: 49029f7907cb7a0fe76df029b23bcd76bb33148677c5eca88bf8abfcfcf8024f
font_01_sfnt_off00010eb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EB1 10616 bytes
SHA-256: d52a8e91866f3b209ba13d15fc7f40642d3c3fe22402ce645c382fb5f4511f3f
font_02_sfnt_off0001330c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1330C 16140 bytes
SHA-256: 159427b32ed66bfbde86def5e6c2992bde67dfb25400c4000a37c9b59b949b61
font_03_sfnt_off00014808.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14808 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3