Malicious PDF — malware analysis report

Static analysis result for SHA-256 337b67164fd3b67f…

MALICIOUS

PDF

80.4 KB Created: 2021-02-11 00:22:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: d0944ac5452a2b83538822582a5fee41 SHA-1: e38f76559604630eafee334f80e083805e090901 SHA-256: 337b67164fd3b67fd509e36f62d2e638c9f8fb5c935bc82dfe076638a0bc5f27
246 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://daliroxemonove.weebly.com/uploads/1/3/0/7/130775241/paberilemi.pdf.
  • 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/123?utm_term=conservation+of+matter+worksheet PDF link annotation
    • https://cdn.sqhk.co/jeforije/c7YigZY/92556107166.pdfIn PDF document text
    • https://cdn.sqhk.co/wikaraxixi/fk6hahc/sasikew.pdfIn PDF document text
    • https://daliroxemonove.weebly.com/uploads/1/3/0/7/130775241/paberilemi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383798/normal_6000582b677b2.pdfIn PDF document text
    • https://kifosaxuwaf.weebly.com/uploads/1/3/4/0/134016965/f216840d3c.pdfIn PDF document text
    • https://cdn.sqhk.co/vepefilome/iafyifB/22757772966.pdfIn PDF document text
    • https://guxofoxevi.weebly.com/uploads/1/3/4/7/134737998/26168f.pdfIn PDF document text
    • http://onenature.space/6230545544197rdy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485929/normal_60127c174deab.pdfIn PDF document text
    • https://gegoviboz.weebly.com/uploads/1/3/4/8/134876631/pipadiseritodeligije.pdfIn PDF document text
    • https://vajugape.weebly.com/uploads/1/3/4/7/134767319/zaliwez_pababenoxoboga_bufitodopu.pdfIn PDF document text
    • https://suzefajadovu.weebly.com/uploads/1/3/4/5/134592553/546614.pdfIn PDF document text
    • https://cdn.sqhk.co/mujekesire/81ijSGv/nokamifutajikuketox.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/seriposuj/adenocarcinoma_esofago.pdfIn PDF document text
    • https://s3.amazonaws.com/paxunu/pangngalan_pantangi_at_pambalana_worksheets_grade_1.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_off0000fc42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC42 5096 bytes
SHA-256: 2cec3d8cb3b4e818596f51ff709bbe714476f81d1217b59797db88097bcb35e1
font_01_sfnt_off00010d81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D81 11556 bytes
SHA-256: 6b4cddb2574c9cde9e219691cb7a44816d3cfdbeccf5da9aaf393d459b4f26dc

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