Malicious PDF — malware analysis report

Static analysis result for SHA-256 fee941a0274222d2…

MALICIOUS

PDF

72.8 KB Created: 2021-03-14 12:00:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 8eaf94ca11879150b3d78d41f7e1f2a4 SHA-1: f88fee153a0b319b9aef6bdeed24b6f40deffc41 SHA-256: fee941a0274222d2f81426d076a18b6a6320cdd8b960abadc103b9be3e1703c9
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting or link farms, suggesting a phishing or malware distribution campaign. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to potentially harmful 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 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://jumiwimov.ru/123?utm_term=broken+screen+wallpaper PDF link annotation
    • https://rikizanasurixa.weebly.com/uploads/1/3/1/3/131379420/sapunosemewamej.pdfIn PDF document text
    • https://gawakugoful.weebly.com/uploads/1/3/4/7/134757428/6297975.pdfIn PDF document text
    • https://pavofadibap.weebly.com/uploads/1/3/4/3/134370944/07951bde.pdfIn PDF document text
    • http://parubexe.iblogger.org/website_er_for_pc.pdfIn PDF document text
    • http://satomix.iblogger.org/what_the_bible_says_about_comfort_in_death.pdfIn PDF document text
    • http://zonubeluzi.iblogger.org/puneseripal.pdfIn PDF document text
    • http://wegasanapifare.iblogger.org/rivitidofi.pdfIn PDF document text
    • http://zaxevef.getenjoyment.net/93525890765.pdfIn PDF document text
    • https://lifovidas.weebly.com/uploads/1/3/1/8/131856672/koren.pdfIn PDF document text
    • http://rofodas.22web.org/defaxilezeto.pdfIn PDF document text
    • http://vatamulejuvovi.22web.org/the_end_of_the_world_song_lyrics_and_chords.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dujepuxa.rf.gd/dsssb_prt_1_18_answer_key_2018.pdfIn PDF document text
    • http://tusamovukubug.epizy.com/94180203341.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bcdb5a6-f1b6-486b-b8b6-3917788fda20/online_grammar_quiz_6th_grade.pdfIn PDF document text
    • http://nigiragesowujow.epizy.com/auriculares_bluetooth_android_mercadolibre.pdfIn PDF document text
    • http://kageditivumimor.onlinewebshop.net/31767106939.pdfIn PDF document text
    • http://xebikegami.epizy.com/free_template_brochure_cdr.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc14eed3-73aa-484f-b737-5c3a660aaeb6/12651230649.pdfIn PDF document text
    • http://dukerorute.epizy.com/8420266234.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_off0000df12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF12 5132 bytes
SHA-256: a230542a9182ec1ade1435efbd2692ec0013bc72d515222e8db7469762c15520
font_01_sfnt_off0000f0b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B0 11048 bytes
SHA-256: fe62bc819b117218a1aee164e0889f7d6cabca8b2353c00d6884cd3212d51b82

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