Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e2f37a4250d6782…

MALICIOUS

PDF

72.9 KB Created: 2021-06-09 15:29:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 2ad1adc907b719e925a3061b5b3f9d8f SHA-1: dc8d44dc6f1dabeb636267e74cd475cfce854664 SHA-256: 2e2f37a4250d6782fca3ee094249b9ec00f98a9c203033aaa05fd97526df6506
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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. 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 0.9998

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://crewmak.ru/pbw?utm_term=autocad+2010+crack PDF link annotation
    • https://dotowukigirer.weebly.com/uploads/1/3/1/1/131163902/xolabijud.pdfIn PDF document text
    • https://gagoxesuv.weebly.com/uploads/1/3/2/6/132681450/fe9c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471969/normal_60664caecda90.pdfIn PDF document text
    • https://vetexugosopaviz.weebly.com/uploads/1/3/0/7/130738505/3393429.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401989/normal_5ffb766f45e02.pdfIn PDF document text
    • https://xokebewogaxuwu.weebly.com/uploads/1/3/4/5/134588239/538d9b5380a05.pdfIn PDF document text
    • https://totovipuvo.weebly.com/uploads/1/3/2/7/132740708/f153be72b9ee770.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407729/normal_5fd85d5915fe0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fadoposapat.pbworks.com/f/how_to_delete_joy_launcher_alcatel.pdfIn PDF document text
    • http://wixugigir.pbworks.com/w/file/fetch/144662610/nojipori.pdfIn PDF document text
    • http://jejosuxiz.pbworks.com/w/file/fetch/144928899/linkedin_app_latest_version_for_android.pdfIn PDF document text
    • http://givuvop.pbworks.com/f/pokemon_omega_ruby_rom_for_drastic.pdfIn PDF document text
    • http://siruzosu.pbworks.com/f/12641804070.pdfIn PDF document text
    • http://xiwitanul.pbworks.com/w/file/fetch/144560040/76998365505.pdfIn PDF document text
    • http://jufugoxula.pbworks.com/f/18527393215.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2F3 5104 bytes
SHA-256: 046397335ed02b6cccc188b78a01d8ee5948c71181c397404eb39c5d2887d0f5
font_01_sfnt_off0000e466.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE466 21816 bytes
SHA-256: d7b6f9ef5e1b1252989f267bcc1512a0b6f061cbf85471b9649857677668fc2c

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