Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cedd370a23c2e46…

MALICIOUS

PDF

68.8 KB Created: 2021-02-19 02:50:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: ab8e643cf8d845d5eb2cfa810eff8fa0 SHA-1: 81681041b24f6c25277d9fcbe8621a5fa002a831 SHA-256: 2cedd370a23c2e46773ac6ebbdf592d8a669d96e950726b616fdecb3748ddf40
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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://druttle.ru/wix?keyword=ap+chemistry+chemical+reactions+worksheet PDF link annotation
    • https://ravodesukifalav.weebly.com/uploads/1/3/1/1/131163780/1e20ff.pdfIn PDF document text
    • https://cdn.sqhk.co/romilononove/mjiheja/slots_online_real_money_uk.pdfIn PDF document text
    • https://kuvezuwuziteb.weebly.com/uploads/1/3/4/3/134388010/4662101.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371508/normal_600a4a5a443e2.pdfIn PDF document text
    • https://cdn.sqhk.co/wifinalimow/iKthimq/iowa_storm_damage_photos.pdfIn PDF document text
    • https://cdn.sqhk.co/mogidamiko/hhihhCr/56227721559.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366017/normal_5fcdc11e46fe6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368243/normal_60136d5c491d9.pdfIn PDF document text
    • https://ligepakege.weebly.com/uploads/1/3/1/8/131871609/7398615.pdfIn PDF document text
    • https://fidojosamesevuf.weebly.com/uploads/1/3/4/5/134594598/b708c30f67263.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426090/normal_5ffc89a72b881.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369633/normal_5fe2c59b54d93.pdfIn PDF document text
    • https://cdn.sqhk.co/zifuvifiweva/frhiuje/nakofuwajelato.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xenuduximowub.epizy.com/al_furqan_school_uniform.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_off0000d23e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD23E 5420 bytes
SHA-256: 0c5dc5a798b42128d945e40e250816969f39e905694f4bff3f026e148809b183
font_01_sfnt_off0000e496.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE496 10088 bytes
SHA-256: 5da7f963396a30637f87f7cccb216702ff015506c0d1a0382452edbfd35813fe