Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bd01803f980c3a0…

MALICIOUS

PDF

68.8 KB Created: 2021-02-20 14:49:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: dbacadbe6265df288fbc72ef75139510 SHA-1: 4f21cbba4018326e6bebf5458b85addbecaf5044 SHA-256: 1bd01803f980c3a0888fa609a36c93545a3bdaf6300ec8517eb7952e0cb0dbd0
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wix?keyword=activity+3.1+linear+measurement+conclusion+answers In PDF document text
    • https://cdn.sqhk.co/murefazomejo/ehdgdTt/40953782318.pdfIn PDF document text
    • http://tk-time.site/nufenorimurogaretobizatals3cj.pdfIn PDF document text
    • https://cdn.sqhk.co/taduzotul/etaVtjd/download_fonts_on_iphone_for_cricut.pdfIn PDF document text
    • https://cdn.sqhk.co/miwataxanis/wgi5e50/breakout_ultimate_brick_breaker_super.pdfIn PDF document text
    • https://rurusoweloxefug.weebly.com/uploads/1/3/3/9/133989150/doxaj.pdfIn PDF document text
    • https://lividuxu.weebly.com/uploads/1/3/4/3/134354071/delitivude.pdfIn PDF document text
    • https://cdn.sqhk.co/fuxiwimemo/iaihXhe/dragon_age_inquisition_haven_battle_music.pdfIn PDF document text
    • http://euroshopme.site/autoharp_sheet_music_free_online0u22c.pdfIn PDF document text
    • https://cdn.sqhk.co/nufopusifa/gfgduia/gulatalirexesevojuvowatu.pdfIn PDF document text
    • https://pulamawuba.weebly.com/uploads/1/3/0/8/130873907/5570018.pdfIn PDF document text
    • http://wdd13.ru/self_belief_quotes_in_hindi65k7l.pdfIn PDF document text
    • https://nitevugumosu.weebly.com/uploads/1/3/4/5/134526644/lutudesume_buseget_bikig.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/limepusotanal/wanatadinix.pdfIn PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/board_member_application_form.pdfIn PDF document text
    • http://mexokibalu.epizy.com/black_hd_wallpaper_for_android_mobile.pdfIn PDF document text
    • https://s3.amazonaws.com/zabejuvijolu/69122756520.pdfIn PDF document text
    • http://nifugimifise.epizy.com/45949410160.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_off0000cee2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEE2 5436 bytes
SHA-256: e4eec34cc5473f6a8bad2efa0ab1d0cb05dda0bcb012a3a8f70cc14c86a30d89
font_01_sfnt_off0000e174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE174 9968 bytes
SHA-256: f4b5f0fddf13b1866edcfc1870a8b93e61be9d6eb89db3fdd3ad17148d025586

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