Malicious PDF — malware analysis report

Static analysis result for SHA-256 e839fdce554a8930…

MALICIOUS

PDF

79.7 KB Created: 2021-03-02 19:57:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 56b4135d61b253d7f1afa7f0bc112be8 SHA-1: 3258ce656d884476fe231b8d261dc4e1f5e41a74 SHA-256: e839fdce554a8930dfa82524efa52fb899552d3a1b79ebd4c377c9626d56c8f1
126 Risk Score

Malware Insights

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

The PDF contains embedded URLs disguised as movie download links, a common lure for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites, likely for further exploitation.

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://pelibifir.ru/wb?keyword=the%20hunger%20games%20catching%20fire%20movie%20in%20hindi%20watch%20online PDF link annotation
    • https://cdn.sqhk.co/sinupupuzaxa/uZLgjhj/dinosaur_game_deadly_dinosaur_hunter.pdfIn PDF document text
    • https://cdn.sqhk.co/mibemofega/hbaighh/stack_blocks_3d_level_134.pdfIn PDF document text
    • https://cdn.sqhk.co/luzigagoguna/pOidtgd/microban_24_hour_spray_walmart.pdfIn PDF document text
    • http://plsale.pro/scholarship_affidavit_format_in_hindi5cvei.pdfIn PDF document text
    • https://cdn.sqhk.co/zogobadakedu/Kgcliex/airthings_wave_mini_radon.pdfIn PDF document text
    • http://health-top.ru/51581929347sn9z4.pdfIn PDF document text
    • http://bestsalestoday.xyz/informacion_sobre_atapuerca_para_nios4yzyd.pdfIn PDF document text
    • http://fridgeservice.ru/dajisutilasijixaneregapuk57d.pdfIn PDF document text
    • https://cdn.sqhk.co/dixejetafap/ifxjdha/learn_spanish_free_audiobook.pdfIn PDF document text
    • http://mnclassis.org/kaliwemeretoforaragimijirhdvd.pdfIn PDF document text
    • http://dvigatel.guru/lenovo_x1_carbon_5th_genqnpa4.pdfIn PDF document text
    • http://fitnesspack.net/cinemas_in_vietnamvxh0l.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/gajakelegeza/dodowiwotakijuv.pdfIn PDF document text
    • https://s3.amazonaws.com/woberiz/bad_boy_buggy_recoil_parts_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/cutting_tools_list.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/43366211154.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_off0000f9eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9EB 5536 bytes
SHA-256: 9ef649b3bff7518ad121ae7cc5a222881d4b1825e1f458037b290e8b84df1be6
font_01_sfnt_off00010cad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CAD 10852 bytes
SHA-256: c28bcc52550fc650676ac36e19feea46d37294579ffd9c5ba8693637425b2030

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