Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b1e4753a41593f3…

MALICIOUS

PDF

71.5 KB Created: 2021-03-03 18:53:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 1bc348e995f48a20ca03fef7122bbb12 SHA-1: 73c5d491f09ef9c88d276a24b4b297562ad9b85e SHA-256: 1b1e4753a41593f3e7196fdb0fcc9b5eccc1116954cb512a5a59281ee0067fac
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/award?keyword=hp+p3015+maintenance+kit+instructions PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4390056/normal_5fd866fd3d3a6.pdfIn PDF document text
    • https://jufoxaju.weebly.com/uploads/1/3/4/4/134489692/mojolanetuj.pdfIn PDF document text
    • https://jawuvufos.weebly.com/uploads/1/3/4/8/134856807/6745100.pdfIn PDF document text
    • https://sawagifavemon.weebly.com/uploads/1/3/0/7/130775832/wodefof.pdfIn PDF document text
    • https://cdn.sqhk.co/kekagate/ghgjhwm/84536641444.pdfIn PDF document text
    • https://gogesatita.weebly.com/uploads/1/3/4/3/134321397/gogobetis_kalujupux_tozosebasapuxef_gusadikep.pdfIn PDF document text
    • https://cdn.sqhk.co/zibomevuguli/iiKhbUo/plants_vs_zombies_2_game_online.pdfIn PDF document text
    • https://dirotigakavomak.weebly.com/uploads/1/3/4/2/134235834/902064a6baaeb6f.pdfIn PDF document text
    • https://cdn.sqhk.co/pugirunosamo/hjisCAf/78478732018.pdfIn PDF document text
    • https://cdn.sqhk.co/gopepilexafi/Rhdxgf4/unlimited_free_vpn_betternet.pdfIn PDF document text
    • https://juvejisedebuz.weebly.com/uploads/1/3/2/7/132740880/robixo_pisago_bupubid.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388614/normal_60074c707e40a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530578/normal_6038d21d3923e.pdfIn PDF document text
    • https://cdn.sqhk.co/jopubelo/diHWTUP/97940071292.pdfIn PDF document text
    • http://rijexofugovu.medianewsonline.com/how_to_operate_a_luxpro_thermostat.pdfIn PDF document text
    • https://paweweribawu.weebly.com/uploads/1/3/4/6/134656346/4831662.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405179/normal_602649cd482f0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://forezepolutaju.onlinewebshop.net/vuwawutizoxo.pdfIn PDF document text
    • https://s3.amazonaws.com/sefukirexuwekij/parewemawanolubevi.pdfIn PDF document text
    • https://s3.amazonaws.com/degagaziv/vobomuro.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_off0000db54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB54 5552 bytes
SHA-256: e1c869d009f9c59c421d98d09666308fe334e300326781dc546bf226f8f50cf6
font_01_sfnt_off0000ee2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2F 10080 bytes
SHA-256: aae61117fa5e22f5d4f541995f168fa5222c30f3760d5a039e22c89c9fcc18be

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