Malicious PDF — malware analysis report

Static analysis result for SHA-256 6080a3c442f48f1c…

MALICIOUS

PDF

77.6 KB Created: 2021-01-11 22:53:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d44cad06a3e9f903fb07e0ef6da90833 SHA-1: 5af118d0f2327340a4a91290e8fac3422bf86eb9 SHA-256: 6080a3c442f48f1c9c08dbbaf9472f915b3bf696753b92544037720f4114b3dc
216 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 seed-phrase/secret-recovery 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
  • 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.
  • 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.
  • 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://trafffe.ru/aws?utm_term=assinar+pdf+com+certificado+digital+adobe PDF link annotation
    • https://cdn.sqhk.co/sojetaji/jjcgdZ2/jewish_women_s_history_month.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443341/normal_5fe513051c121.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483070/normal_5ffa8d5b340bd.pdfIn PDF document text
    • https://febelozo.weebly.com/uploads/1/3/4/5/134599394/xizix_luradebakagigow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366402/normal_5f99e9fbb9b37.pdfIn PDF document text
    • https://cdn.sqhk.co/gufezitaxato/b1jaJkU/wave_live_wallpaper_premium_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393348/normal_5faddbaa1593a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414852/normal_5fd898656c256.pdfIn PDF document text
    • https://cdn.sqhk.co/jivapereb/igOtziL/grocery_delivery_palo_alto.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367937/normal_5fc17a80a660b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402533/normal_5fdd84d306bb9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fewifuwu/madabulovele.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 6

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_off0000f022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF022 5604 bytes
SHA-256: 28a554b1e248fbcf02877408fbb916191cb0d16162a72f33ac080806a892333f
font_01_sfnt_off0001031d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1031D 10656 bytes
SHA-256: a4c01fb35d32ce9a2a465ead71f87a57eaf51879d996b6e1db81fba67e24d4eb

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