Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd5cce6569f253b4…

MALICIOUS

PDF

75.2 KB Created: 2021-03-09 23:45:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 3717f86d08dca9d4a4ce116760820c6b SHA-1: bb9ee9a7c6f108969e60c5290607a51b151c67a1 SHA-256: fd5cce6569f253b45ed7790baba068d3db5de0a63f54e6c98277e2586c1d5a30
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to external websites, many of which are hosted on disposable domains and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content.

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://ponafet.ru/123?utm_term=my+autograph+movie+video+songs PDF link annotation
    • http://zumewidife.mygamesonline.org/letaderakugepis.pdfIn PDF document text
    • http://gramnews.xyz/balance_sheet_request_letterdns13.pdfIn PDF document text
    • http://nanamojuvimujo.medianewsonline.com/the_lion_the_witch_and_the_wardrobe_cast_of_characters.pdfIn PDF document text
    • http://tendernes.ru/19249158048aweyv.pdfIn PDF document text
    • http://poopo.ru/tivaxosavozukijabaggc.pdfIn PDF document text
    • http://wemuwetafivaxe.sportsontheweb.net/rafadozekijegipur.pdfIn PDF document text
    • http://nakalabaxis.mywebcommunity.org/xelupidofogubaxi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419633/normal_602cf81e833e1.pdfIn PDF document text
    • http://juzezudusota.mypressonline.com/what_are_3_negative_character_traits_does_odysseus.pdfIn PDF document text
    • http://deflecfcvy.best/fender_stratocaster_headstock_templatebo4v8.pdfIn PDF document text
    • http://profit-makers.club/38600885993quq2c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487902/normal_5ff500c60df49.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375521/normal_5ff7e725b5b8f.pdfIn PDF document text
    • http://tujemet.scienceontheweb.net/how_to_install_wolf_microwave_trim_kit.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wikukodukoja.onlinewebshop.net/who_pays_for_transgender_surgery.pdfIn PDF document text
    • http://jokosen.atwebpages.com/is_the_spy_museum_in_dc_worth_it.pdfIn PDF document text
    • http://lipeporo.onlinewebshop.net/sufoxesuximigu.pdfIn PDF document text
    • http://kipejefanowisu.atwebpages.com/traxxas_vxl-3s_wont_turn_on.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_off0000e758.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE758 5508 bytes
SHA-256: 16f41c2598e980bb89de797d75d091351b0e2435c6b919d706d1dfba139ed960
font_01_sfnt_off0000fa05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA05 11212 bytes
SHA-256: 32be4e2edc4c5c5d45867b663db1a29bb52ae266a63427b068e2357f1b8a5734

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