Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c5d2c2d7c4c34f7…

MALICIOUS

PDF

62.9 KB Created: 2021-02-12 06:38:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 53358ae565a91a6f3b676491c93dac54 SHA-1: 88380fb576212da7bb0f60369a0e1c45d6d6569f SHA-256: 4c5d2c2d7c4c34f7964b447131105aea843a0075ccc317ad4eb02ce01153a5c5
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://jottigo.ru/wix?keyword=cpcs+study+guide PDF link annotation
    • https://cdn.sqhk.co/raxoxawupej/hgiihfE/wewagelifamejodapisopezow.pdfIn PDF document text
    • https://pesasujax.weebly.com/uploads/1/3/4/8/134882000/liwoguw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450513/normal_601f57db689c0.pdfIn PDF document text
    • https://cdn.sqhk.co/lofujumixas/dHy3Kil/74184301300.pdfIn PDF document text
    • http://front-glass.space/harvard_business_review_subscription_costbuwhj.pdfIn PDF document text
    • http://jobs-ingenieur.best/vishram_singh_anatomy_head_and_neck_downloadyz9ym.pdfIn PDF document text
    • http://scrlt.xyz/41235106191ac9yt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425933/normal_6007f45bce8eb.pdfIn PDF document text
    • http://service-hire.com/eu4_remove_trucey98va.pdfIn PDF document text
    • https://cdn.sqhk.co/nojumuku/iuIhbjf/necromancer_girl_names.pdfIn PDF document text
    • https://cdn.sqhk.co/bivuwusim/idt5haW/xerazevozopelukipidumif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477913/normal_601f1ccf27d1e.pdfIn PDF document text
    • https://cdn.sqhk.co/dosazuleg/LWuigke/45753621688.pdfIn PDF document text
    • https://cdn.sqhk.co/wobuwaseja/xjhJiab/vetazozipijawurugusifegax.pdfIn PDF document text
    • https://cdn.sqhk.co/pibexezases/hOha8je/diversions_game_room_san_antonio_tx_78216.pdfIn PDF document text
    • http://albatros-trans.ru/mimukupuxadun0nqy0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408996/normal_601e5be4dd0a9.pdfIn PDF document text
    • https://sazejibapox.weebly.com/uploads/1/3/4/8/134863873/nozoje.pdfIn PDF document text
    • https://cdn.sqhk.co/ropikenetu/jaigDha/bubble_shooter_classic_mod_download.pdfIn PDF document text
    • https://cdn.sqhk.co/zururodi/Fjcwhic/superhero_invitation_maker_free.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_off0000baea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAEA 4908 bytes
SHA-256: ca4cddf3db8592bf2f6cf53411ae32c735f0fc78fbcb30cc8237ff1e6e5e6dac
font_01_sfnt_off0000cbbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBBC 10232 bytes
SHA-256: 70e181f3ca4df2cb687aab8ca5f721ab76148fd4788da9b6b40adabbc4f1f875

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