Malicious PDF — malware analysis report

Static analysis result for SHA-256 aab5782ef34780d8…

MALICIOUS

PDF

65.6 KB Created: 2021-02-12 00:51:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: c1951fe67c89c0dbdba077bf4e0e8a76 SHA-1: db733574849e65501647b17b8f9b73c54015ee0d SHA-256: aab5782ef34780d8e2c849f8a2077ce884afca5f4ae248841be3d257540c36db
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing site. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's part of a phishing campaign, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://jacksth.ru/wb?keyword=agnisakshi%20video%20song%20free PDF link annotation
    • https://cdn.sqhk.co/jagojixego/eK6Ahju/janorajuxidulorobuw.pdfIn PDF document text
    • https://cdn.sqhk.co/suxujaba/gdxjdia/zixeraxo.pdfIn PDF document text
    • https://wimiberurazem.weebly.com/uploads/1/3/4/3/134351881/1908554.pdfIn PDF document text
    • https://pasifoberili.weebly.com/uploads/1/3/4/8/134881239/buwedewufawozasubeb.pdfIn PDF document text
    • https://pedigibija.weebly.com/uploads/1/3/1/8/131857049/kivijorazomib_wagigojiku.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bikumekomem.epizy.com/kutojalon.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/razagirasi.pdfIn PDF document text
    • https://s3.amazonaws.com/jeponowon/new_android_mobiles_under_15000.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/childish_gambino_song_free.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_off0000c3fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3FC 5248 bytes
SHA-256: 67c9d038db81989fd507b9824911d647eb3334598d041e11c141018ab1b10c1a
font_01_sfnt_off0000d5e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5E2 10628 bytes
SHA-256: 7c8b40f6e7ab1c6ad5e74bc0d35ea0ebd99929aaf7589fe197e7f9e6ec33252b

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