Malicious PDF — malware analysis report

Static analysis result for SHA-256 64be086e258707e6…

MALICIOUS

PDF

83.2 KB Created: 2021-03-02 07:03:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: dfa6f017de6ce6d04e772eca84332690 SHA-1: 48b27eddedcf95793544abec5653be7cc7523728 SHA-256: 64be086e258707e60aeef97e31516951ef1acf25cc852344a2f20917cb89d7a5
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ML classifiers and ClamAV, indicating malicious intent. It contains embedded URLs that likely lead to malware downloads, disguised as software installers. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests a tactic to distribute malicious links across multiple disposable domains, further supporting a phishing or malware distribution scheme.

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 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://jacksth.ru/award?keyword=adobe+premiere+pro+cc+2018+free+download+32+bit PDF link annotation
    • http://vvinorama.website/woxojosujfjl5g.pdfIn PDF document text
    • http://andyhongdigital.com/due_diligence_checklist_templatejn2pb.pdfIn PDF document text
    • http://lbaranaydin.com/adverbs_worksheets_6th_gradeibb0o.pdfIn PDF document text
    • https://sufifova.weebly.com/uploads/1/3/4/7/134736026/14388.pdfIn PDF document text
    • http://tovarzone.ru/kuroripanevo4wa.pdfIn PDF document text
    • http://simopuvoramawu.mywebcommunity.org/how_to_put_together_a_zenna_home_shower_caddy.pdfIn PDF document text
    • http://daravto18.ru/desarrollo_humano_autores_papalia_y_feldman_editorial_mcgraw-hilllh61b.pdfIn PDF document text
    • http://vubitim.sportsontheweb.net/bsf_questions_and_answers_genesis_1.pdfIn PDF document text
    • http://nigemutekilum.mypressonline.com/first_act_of_uniformity_1549.pdfIn PDF document text
    • https://kifosaxuwaf.weebly.com/uploads/1/3/4/0/134016965/7582511.pdfIn PDF document text
    • http://gubixazolela.sportsontheweb.net/47294067440.pdfIn PDF document text
    • https://vufupobuzalezu.weebly.com/uploads/1/3/4/8/134853030/2d88635.pdfIn PDF document text
    • http://gouliwer.online/galactocele_por_ultrasonidogfk81.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://xomapagovujux.atwebpages.com/panasonic_kx-tgc210_white.pdfIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/amitiza_pi.pdfIn PDF document text
    • http://lawaxisagiwog.atwebpages.com/kifufarexizusuzek.pdfIn PDF document text
    • http://rukosivujuxu.atwebpages.com/68324264906.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6EA 5816 bytes
SHA-256: a20c53bf4d732d919c84ae2fe07ab95b131f1f57ce4e403ff5b284966e4470fe
font_01_sfnt_off00010aa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA6 11892 bytes
SHA-256: 99ce93dfc831e8c48145bc6b5f8131714cdbe112eed959fbf06720a5666ae6e5
font_02_sfnt_off00013155.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13155 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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