Malicious PDF — malware analysis report

Static analysis result for SHA-256 f283755454d00ca7…

MALICIOUS

PDF

67.4 KB Created: 2021-02-27 22:23:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: fd93899d29a1c4cfe21e998787425171 SHA-1: c0e6596f6657282fae879149d11fd9dd09522c70 SHA-256: f283755454d00ca769b569a099b37c40f44f3e371164dffdf7f84a9286738f3d
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. ClamAV and ML classifiers strongly indicate maliciousness, likely related to phishing or malware distribution. The embedded URLs suggest the primary goal is to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=league+battle+deck+lists PDF link annotation
    • http://kadaxejob.mypressonline.com/astro_a20_ps4_best_settings.pdfIn PDF document text
    • http://nomenowunesazoz.scienceontheweb.net/weber_grill_parts_serial_number.pdfIn PDF document text
    • https://mimasalidapu.weebly.com/uploads/1/3/4/4/134466186/zojiraman.pdfIn PDF document text
    • http://jalazekesofijot.medianewsonline.com/93407779080.pdfIn PDF document text
    • https://javumegibevi.weebly.com/uploads/1/3/4/6/134634398/pitipawe.pdfIn PDF document text
    • https://vaxetilunakado.weebly.com/uploads/1/3/4/0/134012354/152454.pdfIn PDF document text
    • https://zafozudakajadev.weebly.com/uploads/1/3/0/8/130814863/6998195.pdfIn PDF document text
    • http://kutatit.getenjoyment.net/96476427168.pdfIn PDF document text
    • https://mifadugusukar.weebly.com/uploads/1/3/5/3/135337027/8969216.pdfIn PDF document text
    • https://xotufidew.weebly.com/uploads/1/3/1/8/131856134/jemojux.pdfIn PDF document text
    • http://gepexoliv.medianewsonline.com/the_possibility_of_evil_study_questions.pdfIn PDF document text
    • https://gagoduxo.weebly.com/uploads/1/3/1/4/131452981/9703250.pdfIn PDF document text
    • http://metoxegid.mygamesonline.org/jenn_air_range_top_with_grill.pdfIn PDF document text
    • https://mupezoki.weebly.com/uploads/1/3/0/7/130739180/1986519.pdfIn PDF document text
    • https://sifegofariwe.weebly.com/uploads/1/3/1/4/131437131/soxogabojonim-towagox-tepufe-sozojowobote.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/fuvidokibet/whatsapp_stickers_apk4fun.pdfIn PDF document text
    • https://s3.amazonaws.com/wokesabisevo/92413636091.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_off0000cba1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBA1 5156 bytes
SHA-256: 148c33f5c8b614858625816275359f9d364ef727089568eb5a3f0dcfb7089623
font_01_sfnt_off0000dd44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD44 10288 bytes
SHA-256: 6578b21aaa6854a78fea676366b3703b7da97d23d0177e96e8521c069ebab998

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