Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c1a0c6e77bc3c37…

MALICIOUS

PDF

73.1 KB Created: 2021-03-01 23:57:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 3235641664e9d190623f05f7744ae371 SHA-1: 5ceb124f4ba2873d77359db4b41397d69cfda9cd SHA-256: 4c1a0c6e77bc3c37366a45f102ce2dd962f2a8e276862bf89d17d32314c91a23
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://xajibur.ru/wb?keyword=how%20to%20make%20a%20mask%20in%20illustrator PDF link annotation
    • http://lnstagramverifiedsbadgeforms.com/blue_theme_song_320kbps6gwfp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450870/normal_602b6c45cfede.pdfIn PDF document text
    • http://laitlabs.pro/megukosavawql7x.pdfIn PDF document text
    • https://tujobofawoti.weebly.com/uploads/1/3/2/6/132695409/jufawew-jiwitowamewa-tudewimopedaluz.pdfIn PDF document text
    • http://robinmani.site/52123603138u0x2u.pdfIn PDF document text
    • http://ro-shop.space/ganomazivprv8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458622/normal_6024c10fa69be.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465149/normal_5fc727eb85897.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374519/normal_5fd817dca9a77.pdfIn PDF document text
    • http://presentinsta.site/97250622827vtpxl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445564/normal_60210adeefade.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369487/normal_603c06e9b5670.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kedukukixef.epizy.com/how_to_day_trade_books.pdfIn PDF document text
    • http://menufuvaso.rf.gd/tm_apostol_calculus_volume_2.pdfIn PDF document text
    • http://notijopozij.epizy.com/78092519701.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_off0000e0b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B7 4948 bytes
SHA-256: 54eeef9b965a3beab0d2e2bedaa838d6b27daf1ad1cd5398984f236861ab65a8
font_01_sfnt_off0000f17d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF17D 11200 bytes
SHA-256: 3a8efe1cc78e3c92f91d033c22bfc20702ca3fbca8fb3cb9735b83802a7f7463