Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec3542024e8de3ba…

MALICIOUS

PDF

78.5 KB Created: 2021-02-28 21:00:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: c6d31ee2cf970f7a21e81c38473769d6 SHA-1: 22bc58b35f107fb73d37288c15e65c85081d32ae SHA-256: ec3542024e8de3baf69bd66bfff7eceaa5390fa6e3accea822a82757ed7e51d4
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 high likelihood of malicious intent. It contains an embedded URI pointing to 'seumenha.ru', which is likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, potentially for credential harvesting or further payload delivery.

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://seumenha.ru/wix?keyword=export+google+sheet+to+google+doc PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379220/normal_60391efa3625c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484364/normal_600facdfdf825.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470232/normal_5ffd62e7349e5.pdfIn PDF document text
    • https://cdn.sqhk.co/zejejofe/gfjdgu5/jumbo_pizzeria_slice_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/zojixemem/ieBhiha/lisadinikifadebiko.pdfIn PDF document text
    • https://cdn.sqhk.co/terasovo/hjbNZig/granny_smith_applesauce_calories.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391314/normal_601a4141d07d2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403429/normal_5fec6797485d7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377662/normal_5feb49afd136e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407795/normal_601a3920f2116.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427785/normal_6030f90b61569.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381735/normal_6024676854d0e.pdfIn PDF document text
    • https://cdn.sqhk.co/zowonefaso/hgiiuhd/attack_the_light_apk_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/kofelejezem/SXhfgiA/gapizujuvetujeduvujife.pdfIn PDF document text
    • https://cdn.sqhk.co/loganidob/Cifgj8I/dog_cat_bird_picture.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://rususekobijo.myartsonline.com/subuto.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9C 4784 bytes
SHA-256: 8350f6f97230cc24afc5c242addd35ea3a98ceea7260b96f6bb18d42976409c8
font_01_sfnt_off0000fb02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB02 10412 bytes
SHA-256: d2e950e96260d7969663cbf6e263945b87d5680ec03d3c4f0dd52edcdb27624c
font_02_sfnt_off00011eac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EAC 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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