Malicious PDF — malware analysis report

Static analysis result for SHA-256 a17fb51eeb57d842…

MALICIOUS

PDF

83.4 KB Created: 2021-02-24 21:14:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 8b24a29eacfa814ce2ce9465e8cae1eb SHA-1: 685aad0fe232d1becadf81adcec4848bb27cfdc9 SHA-256: a17fb51eeb57d8422e7a01b48a16cfe1c9055dfe70a8740a76e499c470ac6e91
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users. The primary URL, 'https://seumenha.ru/wix?keyword=petsafe+shock+collar+manual', indicates a lure related to pet products, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=petsafe+shock+collar+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4479932/normal_600aab5c30654.pdfIn PDF document text
    • https://bobefadapuxat.weebly.com/uploads/1/3/4/8/134858353/pegexewibog.pdfIn PDF document text
    • https://kufoxigokutef.weebly.com/uploads/1/3/1/8/131856815/tupikebukebal.pdfIn PDF document text
    • https://cdn.sqhk.co/wojipezusax/jx54yg8/nekijuxinobaxinilotes.pdfIn PDF document text
    • https://cdn.sqhk.co/sunomedude/ujco6z5/pinata_apple_substitute.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384459/normal_603220371e1b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375504/normal_5fdab35a9293f.pdfIn PDF document text
    • https://cdn.sqhk.co/gurudulep/Asig0hf/85036002350.pdfIn PDF document text
    • https://buliduxefexefux.weebly.com/uploads/1/3/1/6/131636978/rexaxuti_velebaxom.pdfIn PDF document text
    • https://cdn.sqhk.co/pifonode/ghhihia/sutarisor.pdfIn PDF document text
    • https://vunakeba.weebly.com/uploads/1/3/4/6/134623580/tirevavax_logima_zudoseligopa.pdfIn PDF document text
    • https://cdn.sqhk.co/tekuligote/Dheifhf/deronudolaxamupuxajab.pdfIn PDF document text
    • https://cdn.sqhk.co/jagojixego/iN2hjjc/nasewutimoleterenas.pdfIn PDF document text
    • https://cdn.sqhk.co/tefazaturar/hjjFdnT/dipson_movie_theater_near_me.pdfIn PDF document text
    • https://lawuzifelive.weebly.com/uploads/1/3/4/0/134041442/latolawafudeb.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/tobobowu/biology_mitosis_vs_meiosis_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/bypass_road_movie_480p.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/black_and_decker_hedge_trimmer_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/tolanevamegifikefozemovel.pdfIn PDF document text
    • https://s3.amazonaws.com/lezerawe/flow_cytometry_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/lomiwexuva/amapiano_drum_kit.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_off0000fc39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC39 5184 bytes
SHA-256: f5725c17841de2c1d6f0cce3abc42cc8c8807e5df13be85c953a5952852b3f3f
font_01_sfnt_off00010dba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DBA 15572 bytes
SHA-256: 83ca501e0e74c5f8aa96bb7df6eb14dc5ccd8e11a62ef88e4c45b35930a97250

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