Malicious PDF — malware analysis report

Static analysis result for SHA-256 5195dfe7e87239f1…

MALICIOUS

PDF

76.4 KB Created: 2020-11-23 22:46:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 648c82a9fdf0e6d4d9348045df06d5ce SHA-1: b8f129175f0419d88e70f956ef7b8e75053dd288 SHA-256: 5195dfe7e87239f199346ab855e284e43c4659569e186e5cc848c9faead41c09
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains an embedded URL that directs users to a suspicious domain, likely to deliver a malicious payload or phish for information. The document body, though heavily obfuscated, suggests a lure related to scientific questions, which is a common tactic for social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffking.ru/123?utm_term=which+of+these+questions+can+be+answered+using+scientific+methods PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4444123/normal_5fb587665702e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367275/normal_5f962da45e310.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413714/normal_5fa7e7e583a09.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/xumakomowi/43258066824.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/pokemon_uranium_cheats_xp.pdfIn PDF document text
    • https://s3.amazonaws.com/timafatafej/dakelitikenulaxi.pdfIn PDF document text
    • https://s3.amazonaws.com/venunamazozuzo/61042411147.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/vofamirufulenozu.pdfIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/45561001105.pdfIn PDF document text
    • https://s3.amazonaws.com/daxemo/lowatomibetuwije.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/mavifelamebejit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28c2e3d3-4b4e-4013-bbe2-354a9e45a5c8/475866111.pdfIn PDF document text
    • https://s3.amazonaws.com/zowejunef/dasexabo.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_off0000eb5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB5E 5776 bytes
SHA-256: b7a465ef9fcac03da1fbb975c5648f376fe7b834b2dd1070cd7cf182fcb3817e
font_01_sfnt_off0000fef1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF1 10860 bytes
SHA-256: 8a2e837f2f8f523fcb9baf233bb4cad39a9188fcaca8430d7f410268f54a1e92