Malicious PDF — malware analysis report

Static analysis result for SHA-256 f884d4f3ea6e85ba…

MALICIOUS

PDF

69.7 KB Created: 2021-02-26 19:12:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: b6111f5647b9f61ed1df16ced266713d SHA-1: 7f0322434f7514bdd752bbcf1c6e2e54cb961b12 SHA-256: f884d4f3ea6e85baf4674056445829dad83ad61b8a50f8a585097bacbc0d8ebe
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm or phishing lure. The presence of external URIs and the overall structure strongly suggest an attempt to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dugedepap.ru/wix?keyword=the+patriot+movie+worksheet+answer+key PDF link annotation
    • http://marketitaly.pro/homelite_26b_leaf_blower_wont_startzs8ah.pdfIn PDF document text
    • http://abwaab.su/kijiwakafisorolarusakos3mzu.pdfIn PDF document text
    • http://czecheducation.space/84020644581zlur2.pdfIn PDF document text
    • http://esparks.ru/71853554438ry0gd.pdfIn PDF document text
    • https://cdn.sqhk.co/xelalizogim/hagdiaH/vifalimogaxunakivufa.pdfIn PDF document text
    • http://hookup682.site/sabemogonixanegit.pdfIn PDF document text
    • https://cdn.sqhk.co/vuwonesi/ijBiejj/23053273457.pdfIn PDF document text
    • http://j3vnci4.xyz/can_enthalpy_change_be_negativex3wxo.pdfIn PDF document text
    • http://xtreme-sport.ru/31207649170vdzh9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472491/normal_60379b3a3383f.pdfIn PDF document text
    • https://cdn.sqhk.co/razilipot/aN3hdjh/36462410881.pdfIn PDF document text
    • https://cdn.sqhk.co/tedubifo/gkzA7aP/dead_zed_3_hacked_all_guns.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420013/normal_6000691153fc6.pdfIn PDF document text
    • http://alifan.store/58635718951ocg32.pdfIn PDF document text
    • https://cdn.sqhk.co/xataruzepape/epE4uTQ/gibagiledob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481164/normal_6012aeade818b.pdfIn PDF document text
    • http://antonioit.space/egypt_pyramids_history_in_tamilww9f0.pdfIn PDF document text
    • http://form-lnstagramverifiedbadges.com/dusorexinitaxavika9crc6.pdfIn PDF document text
    • http://3gusevshop.website/xalipb2lzh.pdfIn PDF document text
    • http://kovuzaxaf.medianewsonline.com/subaru_pressure_washer_repair.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rosajeku.myartsonline.com/dazizorekimoliperuke.pdfIn PDF document text
    • http://rujidafedisezu.atwebpages.com/black_feminist_thought_citation.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_off0000d5ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5AB 5296 bytes
SHA-256: 4987252c320448dd08bc38b82e0657440364938b0074bb6b347ee52cca86f0f3
font_01_sfnt_off0000e79a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE79A 9900 bytes
SHA-256: a414e30d2ce3345f79c067896a88de46e452364e5f92c170c1acbc5051f69519

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