Malicious PDF — malware analysis report

Static analysis result for SHA-256 29c6b7d1d2b6dd0a…

MALICIOUS

PDF

74.6 KB Created: 2021-01-31 21:44:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 8b4c6748fd7d8e78a2c87f9c7ce86581 SHA-1: 115ba09a291561dcd152b8bcba08a77c2ae5d303 SHA-256: 29c6b7d1d2b6dd0af9dae212d740abd2dd68e63467cffa6acb3f92eeaedfd3d0
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by multiple heuristics and an ML classifier. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to a user guide, aligning with phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/123?utm_term=insignia+smart+tv+user+guide PDF link annotation
    • https://mufisifarugevap.weebly.com/uploads/1/3/4/5/134595961/266897.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393033/normal_601695f4c107e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379615/normal_5ff2be407d27d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457560/normal_5ff61ab8ce4f3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444875/normal_5ffd07bfe329b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478438/normal_60143483c6f6b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403818/normal_5fd9218683c7f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486053/normal_5fff525cd6549.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458837/normal_60107d67805b9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480173/normal_5fe43d67dd034.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/sefiwegegagu/13899182601.pdfIn PDF document text
    • https://s3.amazonaws.com/marimejerebo/sport_live_apk_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/tutasujal/bitlocker_performance_impact_gaming.pdfIn PDF document text
    • https://s3.amazonaws.com/semuxemakaw/chuyn_file_nh_sang_word_online.pdfIn PDF document text
    • http://xotexipu.rf.gd/samalesefa.pdfIn PDF document text
    • http://kafopazam.epizy.com/ansar_shaikh_book_in_marathi.pdfIn PDF document text
    • https://s3.amazonaws.com/mikibetiv/pabozijenaxugepujopapuran.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_off0000e842.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE842 5108 bytes
SHA-256: 071c857deb6f171ed834f478333e39624e38ca3eacf599df10c767c9bed80207
font_01_sfnt_off0000f992.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF992 10764 bytes
SHA-256: de7a136d4b40ba9287cb0ecbf98587e02d4f66952465b8f9f835666562621f20

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