Malicious PDF — malware analysis report

Static analysis result for SHA-256 40dde2c1a539dd45…

MALICIOUS

PDF

70.9 KB Created: 2021-03-18 16:45:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 60b22e3a9e4763895934fddc1e546d02 SHA-1: b7bbf94305f81f99b898aab50305c1c557864124 SHA-256: 40dde2c1a539dd45ad6fd287aeccaab975308023a6aa3c3ae1d19445191b8405
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains multiple embedded URLs, one of which is directly referenced in the heuristic findings, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to 'Merrell size guide uk', indicating a lure to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://seumenha.ru/wix?keyword=merrell+size+guide+uk PDF link annotation
    • https://cdn.sqhk.co/degavorofala/4rijdij/ecommerce_website_store_builder_appointment.pdfIn PDF document text
    • https://cdn.sqhk.co/sopiloroda/gh0whjP/hero_rescue_2_pull_him_out_of_jail.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453551/normal_5fe903937701c.pdfIn PDF document text
    • https://cdn.sqhk.co/wevafofed/cjd0qOm/cat_running_away.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467926/normal_5fe8e6ecc5b05.pdfIn PDF document text
    • https://cdn.sqhk.co/pugepavofu/NmjijSc/31984260449.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376869/normal_6022b399f24c3.pdfIn PDF document text
    • https://cdn.sqhk.co/wosepimi/oRkhcic/18141862291.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450884/normal_6000679276317.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417308/normal_5fc68845ce8ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485572/normal_5fe98fdaa25aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481406/normal_6046b4fce8ea5.pdfIn PDF document text
    • https://cdn.sqhk.co/nebuneduzib/R5U6DCU/dv247_voucher_code.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374951/normal_6038258a37538.pdfIn PDF document text
    • https://cdn.sqhk.co/buwuvibija/jjwjhb8/kogenonirazo.pdfIn PDF document text
    • https://cdn.sqhk.co/guvevifowo/iajijeM/gebokuzemobiliwesiradinu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443342/normal_601f02ab2fd5e.pdfIn PDF document text
    • http://komunomaled.iblogger.org/99123381389.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391015/normal_603e8ccd2cbf4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384325/normal_5fde91a5eb96c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kepepipobas.epizy.com/ue_megaboom_3_waterproof_test.pdfIn PDF document text
    • http://dusetelonuzaj.epizy.com/munevejazegewapud.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_off0000d835.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD835 4900 bytes
SHA-256: f2fbdecef7daa64fead2e744be8ebd45d005d26efe76025b12c1625f790940bf
font_01_sfnt_off0000e907.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE907 10544 bytes
SHA-256: 7d4fad1a1d735e4f8598e694c3c4353b845e383c0dd5ee59dd12e63ab3477a36

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