Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f383c0790acd604…

MALICIOUS

PDF

73.4 KB Created: 2021-02-17 07:38:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 529bb25dee4a323a95e7621337fe228d SHA-1: 556a268ba0169de4d9f87bfec84a614a67337a9e SHA-256: 6f383c0790acd6041e30a5fa73c47d92c5a27eed26b7021adb5d05e16787f423
186 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
  • 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.
  • 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://maypoin.ru/wb?keyword=chemical%20engineers%20handbook%20perry%20r.h PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4451047/normal_5fe872a13d345.pdfIn PDF document text
    • https://cdn.sqhk.co/rufadexu/gihajfD/nasa_mars_rover_perseverance_live_stream.pdfIn PDF document text
    • https://negipefit.weebly.com/uploads/1/3/6/0/136054485/mubaga.pdfIn PDF document text
    • https://cdn.sqhk.co/salobosemiv/gc7HXjb/bucketlist_bombshells_bad_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/jabuvilir/ioqhggj/pico_de_gallo_recipe_bon_appetit.pdfIn PDF document text
    • https://kumobavubisu.weebly.com/uploads/1/3/0/7/130775432/92714f110249c00.pdfIn PDF document text
    • https://cdn.sqhk.co/bawusipa/jfiaPhi/escape_plan_2_full_movie_watch_online_dailymotion.pdfIn PDF document text
    • https://cdn.sqhk.co/wemitupu/OgRiifr/nevunas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411916/normal_602a970d0d51b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482858/normal_6016d2cbe43c9.pdfIn PDF document text
    • https://vumukawa.weebly.com/uploads/1/3/4/6/134662430/924902.pdfIn PDF document text
    • https://jefabulovonaju.weebly.com/uploads/1/3/1/4/131438419/wipoler.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382965/normal_5feff5f77781f.pdfIn PDF document text
    • https://tiwudusakuwizir.weebly.com/uploads/1/3/1/6/131637104/gewesixodex.pdfIn PDF document text
    • https://cdn.sqhk.co/josozudibud/j4Ghfhh/frases_de_amor_tumblr_em_portugues.pdfIn PDF document text
    • https://sinuvofibudibaf.weebly.com/uploads/1/3/2/6/132696377/wagafusesaw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476274/normal_60070d926968b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419642/normal_602c692285db6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000dfb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB8 5728 bytes
SHA-256: 697910f371f5af80e13f5b2c54515b86f83449578b29ae0f48007113205df37e
font_01_sfnt_off0000f302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF302 11004 bytes
SHA-256: 56b727981c02883c768c391130b0e36cf33f5b5bbb66ebf6c959f6c9b11887b5

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