Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9e1c0d52a341839…

MALICIOUS

PDF

73.7 KB Created: 2020-12-13 13:20:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 857d99ef5af8ecbff3a1b87250c680cb SHA-1: 17b5b78c96e89275354857da2ad80bbf1f15ea4f SHA-256: e9e1c0d52a3418398fba13939f93a8e7a16948f2f03ae31913102540f7b274eb
162 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it's a malicious redirector and a phishing lure, specifically mentioning an invoice. The embedded URL points to a known malicious redirector. While no scripts were explicitly extracted, the ML classifier and ClamAV detection strongly suggest malicious intent, likely to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://ggtraff.ru/strik?utm_term=eso+alchemist+writ+drain+health+poison+ix In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366405/normal_5f88fa82b59fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378827/normal_5fd5f67629da3.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
    • https://s3.amazonaws.com/fekaduvopigab/22979719794.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce0f032ebf7d3ac6434f2e/t/5fd075eac0a29916a56c432a/1607497195142/fokenijuzorapukefeduf.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc55b95df132613bbdb4396/t/5fcec7c5509e863c681ce58c/1607387080133/misadipuxiwijumofisopovi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d00e405d5340f3291e5b/t/5fc1d16d64571256547f6012/1606537582650/cartoons_unlimited_apk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc55349be9b6939512836e1/t/5fc82bd6217b3604edd253dd/1606953943798/desajipadidiwu.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/48680492327.pdfIn PDF document text
    • https://s3.amazonaws.com/gedesisumi/53389151558.pdfIn PDF document text
    • https://s3.amazonaws.com/jofunozuzof/relationship_between_social_science_and_applied_social_science.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc18357bda9c57a97c28a1b/t/5fcc071c260a660a6bc7a080/1607206694031/mario_kart_tour_multiplayer_level_up.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f24c403f5353fd95fd42/t/5fc5a2a4f3de5e49b5279c5f/1606787751187/34875100833.pdfIn PDF document text
    • https://s3.amazonaws.com/lososimap/inland_lakes_in_southwest_michigan.pdfIn PDF document text
    • https://s3.amazonaws.com/ribowexulo/vcds_17._1_3_crack.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc78550418d7934ac777b2c/t/5fd5f466d654060362bc7719/1607857255254/88909785061.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc32a51cd1e280355e2ea57/t/5fce539af94b6402b24adab2/1607357342079/rexigunaboximiditimujoked.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d41c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD41C 5216 bytes
SHA-256: 7ff9701ed3c5760edfbbc0847935373f1406eb3fe7cd18e8b288c8ef1432af28
font_01_sfnt_off0000e5c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C3 11424 bytes
SHA-256: b7ecac847fb58e0fa7fc59c8d403425020ab962fce9b243d366dadad39e1223f
font_02_sfnt_off00010b42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B42 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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