Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1bf1cbd47edb238…

MALICIOUS

PDF

70.2 KB Created: 2021-02-27 09:56:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 46c1555f1a3b977719e2817906b06a77 SHA-1: 34dd1fd303f4a9e9d5503f8e9939bc9094bd5f3a SHA-256: c1bf1cbd47edb238de1e938545ca68ded22a7a99cf68dc32b7c02ff3df62e41e
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/award?keyword=fundamentals+of+computer+course+in+hindi PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368487/normal_60395f098bcdf.pdfIn PDF document text
    • https://cdn.sqhk.co/tezizejaropu/nL7gfn4/61823280287.pdfIn PDF document text
    • https://cdn.sqhk.co/febowozefu/puidPgh/piggly_wiggly_cake_book.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481053/normal_6029ce3dbec9b.pdfIn PDF document text
    • https://cdn.sqhk.co/wirowanorax/hgrhGgf/yellow_plastic_shopping_bags_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/dukizukijire/eS2ahfw/waganivas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454967/normal_603719acddd6c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380393/normal_6038be8bcedd4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446643/normal_5fc809895d115.pdfIn PDF document text
    • https://cdn.sqhk.co/nokotadi/dgfg3ii/77667628790.pdfIn PDF document text
    • https://cdn.sqhk.co/lojenozasila/f2hePjj/microsoft_flight_simulator_air_traffic_control.pdfIn PDF document text
    • https://cdn.sqhk.co/xaselavub/f0jjqhe/halloween_decorations_ideas_for_office.pdfIn PDF document text
    • https://bezijenogekise.weebly.com/uploads/1/3/4/8/134875893/1931039.pdfIn PDF document text
    • https://kesozelakix.weebly.com/uploads/1/3/5/3/135300748/terokuzobaxejur.pdfIn PDF document text
    • https://sozagigojo.weebly.com/uploads/1/3/1/4/131454883/tukudubabonula.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/dazutun/abc_s_of_christian_growth_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/vawoginele/guide_vert_michelin_bretagne_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/bodycon_semi_formal_dresses.pdfIn PDF document text
    • http://vukotirigepiv.epizy.com/wekokenijilukide.pdfIn PDF document text
    • https://s3.amazonaws.com/mekonulegipero/arabische_musik_kostenlos.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/75549242210.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_off0000d72a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD72A 5352 bytes
SHA-256: e945a253a4494c698e4d5ba2b1119add0b6ac72d5f1cf0d627feac48b4a56dd0
font_01_sfnt_off0000e932.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE932 9976 bytes
SHA-256: fdac740076071981198c81e058b316fe02d70b667b08d375608baf6ec8ddb670

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