Malicious PDF — malware analysis report

Static analysis result for SHA-256 baafff03dc2112a2…

MALICIOUS

PDF

73.1 KB Created: 2021-03-01 19:47:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 05581c97af7c00035c8fb3dadd841d6e SHA-1: 202846015605aa4574e246ff5fe8b81505ad9ffd SHA-256: baafff03dc2112a2789c21475cd5ffdfa731f6d81154910d4fd21bc89003407b
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 link disguised as an owner's manual for a 1994 Mercedes E320. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm or redirection scheme. ClamAV detection and ML classification confirm the malicious nature, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/strik?utm_term=1994+mercedes+e320+owners+manual PDF link annotation
    • http://veselutut.mywebcommunity.org/what_time_does_dunkin_donuts_breakfast_end.pdfIn PDF document text
    • http://gifinibufenatar.medianewsonline.com/gusutuxufiki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374954/normal_6030272b3da28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455387/normal_60335768a4bee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495686/normal_5fec13f83f5e6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404738/normal_5fde303bedca7.pdfIn PDF document text
    • https://zoxopabetil.weebly.com/uploads/1/3/1/1/131163737/7230983.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379471/normal_601bb39249cbc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413575/normal_60272b42c2b41.pdfIn PDF document text
    • http://rafupofamurawaf.mygamesonline.org/36146416505.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410414/normal_5fe0e64221404.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374537/normal_6020a8b034b10.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469359/normal_5feb4342dc760.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pirosisob/ielts_academic_question_paper.pdfIn PDF document text
    • https://s3.amazonaws.com/kelukakeb/86771821342.pdfIn PDF document text
    • https://s3.amazonaws.com/daxemo/51213291188.pdfIn PDF document text
    • https://s3.amazonaws.com/gogoxowiniza/gevamebin.pdfIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/rumupipokozojaxixad.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/free_music_online_for_iphone.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_off0000dd38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD38 5816 bytes
SHA-256: f5b27e79621d606bfc3987723f8da8c93cedcb36779d6187d477247d9c3e7a0b
font_01_sfnt_off0000f0fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0FD 10592 bytes
SHA-256: 6822397a2e34b97bc8896d9c45d6886152c238b2e7f2541426e3cdfa49b84af1

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