Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2e7bab70308e254…

MALICIOUS

PDF

62.6 KB Created: 2020-11-19 10:27:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3742eb3a7510e3bf2e60edc64272227d SHA-1: 13645a31966eaa53267e9107cf49875a9dfa7bb3 SHA-256: f2e7bab70308e254721086720ad770c3a82333e50a19bbf3c5d33b483e4af88c
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent URL suggesting a download lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of embedded links and the overall structure point towards a spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffking.ru/strik?utm_term=lil+one+future+download+mp3
    • https://cdn-cms.f-static.net/uploads/4390097/normal_5f96601be7448.pdf
    • https://cdn-cms.f-static.net/uploads/4382193/normal_5fa8055c1828c.pdf
    • https://xapowukugo.weebly.com/uploads/1/3/4/7/134702937/1884262.pdf
    • https://cdn-cms.f-static.net/uploads/4389582/normal_5f9a1dbf83c28.pdf
    • https://cdn-cms.f-static.net/uploads/4456132/normal_5fb5bc1f87e24.pdf
    • https://morurotefat.weebly.com/uploads/1/3/4/3/134317018/6468848.pdf
    • https://cdn-cms.f-static.net/uploads/4378827/normal_5fb410d91ccc8.pdf
    • https://cdn-cms.f-static.net/uploads/4372080/normal_5f8fd0536acfe.pdf
    • https://jubonofu.weebly.com/uploads/1/3/4/2/134234671/056f1.pdf
    • https://cdn-cms.f-static.net/uploads/4413842/normal_5fb38c4b233d8.pdf
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/xenemavurinap_jokepirewiteda_fijalezej_gemewije.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/256b9fd0-aa49-417e-9f19-e0a51d14c33b/gamumagan.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b583.bin
5abaa7f40d2fe9267450c84181aec3fe6a1f101af6859e5a81028f1632798072		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB583 5204 bytes
font_01_sfnt_off0000c741.bin
27260890d14f14c6d2b60e1f451beaed05ade8ca5154134405921ee58c3b6d16		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC741 11288 bytes

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