Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ee87ff1ac5c5bfd…

MALICIOUS

PDF

71.8 KB Created: 2021-01-14 06:14:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: a97a095cba57a1019ed487a9413a8ebf SHA-1: 450b9a6bb176457a61c272a41b57edbaebd9a425 SHA-256: 2ee87ff1ac5c5bfdb2b698c326836d9319ad7edc8e045941bee5acf3afd328a8
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The presence of a large number of external links suggests an attempt to direct users to malicious websites, potentially for phishing or to host further malicious content. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://trafffi.ru/aws?utm_term=carolina+hurricanes+pronunciation+guide PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4482882/normal_5fe0f57488368.pdfIn PDF document text
    • https://site-1176512.mozfiles.com/files/1176512/cute_halloween_costumes_for_teenage_girl_diy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454422/normal_5fd3075cbb525.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457590/normal_5fc3a50ca2853.pdfIn PDF document text
    • https://jimivoxoresovi.weebly.com/uploads/1/3/4/3/134311124/sijapugeti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456687/normal_5fa19f9b5e443.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366655/normal_5f8988ed4a86c.pdfIn PDF document text
    • https://jumifusat.weebly.com/uploads/1/3/4/6/134629025/636f1.pdfIn PDF document text
    • https://site-1083679.mozfiles.com/files/1083679/fadejajogoleta.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407314/normal_5fccfb4beee9c.pdfIn PDF document text
    • https://povurumupun.weebly.com/uploads/1/3/4/8/134884194/4208015.pdfIn PDF document text
    • https://zaxizibu.weebly.com/uploads/1/3/4/6/134672664/5849693.pdfIn PDF document text
    • https://kowalarezanir.weebly.com/uploads/1/3/1/4/131438161/99493d12104a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374710/normal_5fc66941b88a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480591/normal_5fb46f3ee2a5a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000de75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE75 5240 bytes
SHA-256: 9806800ac06e98ee0d92b52e2d25b23fc9dd6bac08dc3a2387d7cc44e8e46662
font_01_sfnt_off0000f034.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF034 9980 bytes
SHA-256: 44f4946b76ee09ffe822722c9dd2badbf3f8afb4a1a590f9b099ee8704fdf8f9

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