Malicious PDF — malware analysis report

Static analysis result for SHA-256 35e4e78164b6d41a…

MALICIOUS

PDF

73.6 KB Created: 2021-01-10 07:09:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 913ed0246f021322aa5c82f6771e1604 SHA-1: d63e848d67c0ebe2485efb79728d4063a18d6c65 SHA-256: 35e4e78164b6d41ad36076667b3486dc23e8b7d1c62f9ebe807f5e3b090c9613
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The ML classifier and ClamAV also flagged this file as malicious, specifically identifying it as a phishing trojan. The embedded URL, 'https://gettraff.ru/123?utm_term=kidde+smoke+alarm+manual+i12060a', is the primary indicator of malicious intent, likely serving as a lure to a phishing page or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://gettraff.ru/123?utm_term=kidde+smoke+alarm+manual+i12060a In PDF document text
    • https://static.s123-cdn-static.com/uploads/4410415/normal_5fd087a2c5132.pdfIn PDF document text
    • https://cdn.sqhk.co/gefisodir/ihjchh5/natuvok.pdfIn PDF document text
    • https://fomezesas.weebly.com/uploads/1/3/4/3/134343882/mapagotugafodu.pdfIn PDF document text
    • https://numuluga.weebly.com/uploads/1/3/4/3/134307024/pubupuguwe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453338/normal_5fad524e19d57.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446388/normal_5fe5809b59674.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477651/normal_5fe1456a8b0a0.pdfIn PDF document text
    • https://cdn.sqhk.co/girasufu/jfjiKno/7488691038.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488090/normal_5fd9301b8d431.pdfIn PDF document text
    • https://cdn.sqhk.co/baluwofuk/fjjwhcN/wikabej.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
    • 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_off0000d60c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD60C 5284 bytes
SHA-256: 5d13f03d334d30efe3508af41ea85c923e4e9ce1ba2713b46ea0149935e23ff0
font_01_sfnt_off0000e7df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7DF 10416 bytes
SHA-256: 2efdd78d16c6d5b629573ef910debbb19e7c88aa4915018dab259f325d9ed99f
font_02_sfnt_off00010b93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B93 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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