Malicious PDF — malware analysis report

Static analysis result for SHA-256 04e9bd83a1cc6418…

MALICIOUS

PDF

75.7 KB Created: 2021-03-24 23:07:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e6ecc9b005836608c3c001e384308432 SHA-1: 2a3689c7e009491317c0209b8da241869db4d67c SHA-256: 04e9bd83a1cc6418394993a7860079da6db670041aa2848ee3c64720d662942d
166 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. It uses a password-protected-archive 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 0.9998

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://crophysi.ru/strik?utm_term=acer+aspire+black+friday+2019 PDF link annotation
    • https://cdn.sqhk.co/terasovo/XBhdHGI/good_drag_racing_games_for_ps4.pdfIn PDF document text
    • http://serururepus.scienceontheweb.net/sibijebesobedal.pdfIn PDF document text
    • https://cdn.sqhk.co/xesofosirija/gcjgJgh/turupat.pdfIn PDF document text
    • https://cdn.sqhk.co/lewiwifo/qXid7hi/marajugirirewe.pdfIn PDF document text
    • https://cdn.sqhk.co/linaxezo/KWhgjja/83636505027.pdfIn PDF document text
    • http://everydays.space/xubegorevdwj84.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488558/normal_5ff6948eaa8de.pdfIn PDF document text
    • https://cdn.sqhk.co/pemoxeriko/jgYojdw/kopekajorofateta.pdfIn PDF document text
    • https://cdn.sqhk.co/soxuvezosapa/e9ji4ha/niwonoj.pdfIn PDF document text
    • http://detonic-ro.website/semi_formal_attire_in_spanishwjk0j.pdfIn PDF document text
    • https://cdn.sqhk.co/kizafizutuw/gcTPgew/best_smart_tv_at_costco.pdfIn PDF document text
    • http://kegetisa.mygamesonline.org/78928501189.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366995/normal_601983cd6549c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/31253359-5cc8-41f7-bb58-97a4bb66fc8e/how_do_you_hook_a_portable_dishwasher.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49a03834-6f74-4873-99fc-0deab6e02db1/what_size_is_a_52_inch_waist_in_womens_jeans.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b88287c4-198d-47d6-b119-169b645202e3/mojofejezawor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7166ea2d-46a7-4b43-8ff1-ff87909e8f7e/25940289615.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a4dfbc0-9fe1-4f58-a10d-295f8c809648/dadinoxijenukeluse.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e458.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE458 5924 bytes
SHA-256: eb22fc890bf9706aee4f550a2cfa3ab8222abdb1d518f44bd9142e71b1d81fc4
font_01_sfnt_off0000f89e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF89E 12384 bytes
SHA-256: 0385b950a8f1c52320bccfde16b1b7ec40abe071336f12f58702243968dbaa74

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