Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf0300a95a347ff2…

MALICIOUS

PDF

75.2 KB Created: 2021-05-23 17:45:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: b2eeea32ef6925cb469d5de29ec511bf SHA-1: ea003bc1f48ba622bc8f3a60f5b245b264638bbf SHA-256: cf0300a95a347ff23a4bd668c6d142d68cc380e8436ac8f9daf44e46c6744227
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for link farms and phishing campaigns. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. The embedded content, though heavily obfuscated, suggests an attempt to lure users to external sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://bologen.ru/strik?utm_term=ganador+de+mega+millions+2021 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4450042/normal_60000dcc6ea83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405902/normal_6014b77dbabb2.pdfIn PDF document text
    • https://bawejitomu.weebly.com/uploads/1/3/1/4/131438353/7646048.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416664/normal_5fc762c1e4bf5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451025/normal_6006b3633f4ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385004/normal_602b3b0be5671.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374978/normal_601ad6e442133.pdfIn PDF document text
    • https://xafusotegemuwif.weebly.com/uploads/1/3/5/3/135304795/tixuwifozufurano.pdfIn PDF document text
    • https://tesebajaja.weebly.com/uploads/1/3/4/4/134402558/33a0964876a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459466/normal_5fd911c506f5a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459922/normal_6007e3849e590.pdfIn PDF document text
    • https://gedexezesojefib.weebly.com/uploads/1/3/4/6/134666283/4185962.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405642/normal_5fd287ead101a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381980/normal_606e3dd49431a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370267/normal_600dc00e16c8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369327/normal_603eb1651efeb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484806/normal_5ffeb45ac3433.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393035/normal_5ffd9f8305688.pdfIn PDF document text
    • https://naranopaxak.weebly.com/uploads/1/3/4/7/134700574/7266b076d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480735/normal_6026229984a64.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475383/normal_5fd0827f5ee49.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e3cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3CF 5504 bytes
SHA-256: d5486e5cbb5df2235dd60ffcba69e324ba18039fb3f4b49acfb420a756f2677e
font_01_sfnt_off0000f672.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF672 12120 bytes
SHA-256: 211112b7d82adf8f34cb7999ce252480f2b1a350430de991af011b15c1113400

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