Malicious PDF — malware analysis report

Static analysis result for SHA-256 65767f4038fcd1e9…

MALICIOUS

PDF

63.7 KB Created: 2021-02-13 02:11:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: cb7fecf134347dafe989e338af67182f SHA-1: b623acb4b6102d54aa65e0798696306fa31f96d6 SHA-256: 65767f4038fcd1e956ee559efe0019b95fad469db60d86a326f75f1f1eacb643
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://bologen.ru/wix?keyword=google+docs+frozen+2+portugu%25C3%25AAs PDF link annotation
    • https://vugovarekuluf.weebly.com/uploads/1/3/1/6/131607096/mulatirupomoto_garadado_voxubewonurola.pdfIn PDF document text
    • https://cdn.sqhk.co/rinugezig/pGVigjg/color_block_jeans_brown.pdfIn PDF document text
    • http://akvatehnika74.ru/armchair_dwg_freebs3ix.pdfIn PDF document text
    • https://cdn.sqhk.co/keropolor/hkMzOic/background_video_recorder_for_iphone.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451566/normal_600668b9e1465.pdfIn PDF document text
    • http://a1metromovers.com/42588797181xc7am.pdfIn PDF document text
    • https://cdn.sqhk.co/jedelamodafa/ajdigNp/best_ifttt_applets_for_productivity.pdfIn PDF document text
    • https://cdn.sqhk.co/tutabalero/ePF7E5o/26034901789.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469834/normal_601be571edfe8.pdfIn PDF document text
    • https://cdn.sqhk.co/sijiposago/qRqgfic/63539704806.pdfIn PDF document text
    • http://filemarker.store/lujezuzoganobalonapen65len.pdfIn PDF document text
    • http://itali-big.space/flush_dns_command_android15bjb.pdfIn PDF document text
    • https://zorivaleguzovul.weebly.com/uploads/1/3/4/5/134596353/9363411.pdfIn PDF document text
    • https://cdn.sqhk.co/baxorurifina/QFa2jgK/mezoxolinobiwagiwexe.pdfIn PDF document text
    • https://cdn.sqhk.co/vibisidumes/4Iq5gg4/14938337043.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/pajukovuxetu/bronchiectasis_journal.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/29016398330.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_off0000b933.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB933 5476 bytes
SHA-256: 0c963ec5a3c3f59db8a9555d2673071d49b9786343903b2ec03dfddf7edff7bf
font_01_sfnt_off0000cbba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBBA 10912 bytes
SHA-256: 9eaeff23e433d60877dcb8cd14d499b8641fac81b3608bb62713d57d793514c9