Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd9b050ec244b1bf…

MALICIOUS

PDF

67.9 KB Created: 2021-02-21 08:53:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 3262ff3f530511b7c6c65221b5d90e87 SHA-1: 44dec7fd6ebf5536cfd753e1352c336eec11ce53 SHA-256: fd9b050ec244b1bf19c4d71eecca28cd93c92b578a6f8071934033b6ad13d6ef
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of a link farm designed for SEO manipulation, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing lure, likely attempting to redirect users to malicious sites.

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://maypoin.ru/wix?keyword=faceing+math+lesson+9+worksheet+answers PDF link annotation
    • https://mixidesurujof.weebly.com/uploads/1/3/4/9/134902607/tedewujej-litawugalimuko.pdfIn PDF document text
    • http://ketosimple.online/44613655390jlf2.pdfIn PDF document text
    • http://macsk.space/xazovilafsyt3j.pdfIn PDF document text
    • http://mrt36.ru/the_galaxy_survivor_free_download_apkpure6qtax.pdfIn PDF document text
    • http://sovetnik53.ru/599913586899mbgv.pdfIn PDF document text
    • http://milansit.space/360_leader_john_maxwellyopux.pdfIn PDF document text
    • http://idealica-tufficiale.website/sixokomafetunidaremozizbo82n.pdfIn PDF document text
    • http://amsidgi.xyz/minion_minecraft_skin_nova0s3oo.pdfIn PDF document text
    • http://7gusevshop.space/pictures_of_catbird_nestsod7rd.pdfIn PDF document text
    • https://nalafefig.weebly.com/uploads/1/3/1/3/131379301/de3c2601814.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/pipaneku/3336095970.pdfIn PDF document text
    • https://s3.amazonaws.com/polojuliragam/fifty_shades_of_grey_full_movie_dual_audio_download_online.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/audit_risk_questions_and_answers_acca.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/pichuva_kathi_full_movie_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/v._c._e_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/zemunomipazikez/rotumekexaluguratawenaxa.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/62586396742.pdfIn PDF document text
    • https://s3.amazonaws.com/sefipa/dead_by_daylight_horrorfield_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/australian_super_fund_nomination_form.pdfIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/chennai_road_map.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_off0000cdc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDC8 5480 bytes
SHA-256: a160e39c0d2d981d42ac2cc1c3752dee8ae8023b7af8dcf2124a895f67bc254e
font_01_sfnt_off0000e053.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE053 9980 bytes
SHA-256: 6c09b49d7cc3b077e6f0339c39194e2753c7842f9ba77f7a306d0746020c8f9f

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