Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4bc306b6cab59a3…

MALICIOUS

PDF

72.3 KB Created: 2021-02-16 10:52:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 8a349a8b66e3e1635a1895d9777f4ff8 SHA-1: 24339dc0d94df5a3805e6ade7dd8a7352100d900 SHA-256: d4bc306b6cab59a32fb72467bcbce94ff8a8899d5e3f8ec28ba40ecdce0d7f7c
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://jacksth.ru/wix?keyword=ucweb+apk+pure PDF link annotation
    • http://trokot-online.xyz/view_archived_messages_on_messenger_androidejfv1.pdfIn PDF document text
    • https://bukivobiwizu.weebly.com/uploads/1/3/4/0/134097020/9354781.pdfIn PDF document text
    • https://xoludebule.weebly.com/uploads/1/3/4/5/134526363/0c508584.pdfIn PDF document text
    • https://jedegifopa.weebly.com/uploads/1/3/0/7/130738854/mijizubezux_xikibinisikaxit_midolewug_pujogozoz.pdfIn PDF document text
    • https://novomuzedideb.weebly.com/uploads/1/3/1/4/131406537/2326138.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497688/normal_5fff19c94b5be.pdfIn PDF document text
    • https://rilumegunelado.weebly.com/uploads/1/3/4/6/134615428/pufade.pdfIn PDF document text
    • http://talkme-news.info/38032746465imfm2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459180/normal_5ff26bdece3ba.pdfIn PDF document text
    • https://sakobapo.weebly.com/uploads/1/3/3/9/133999770/rigatosa-majajaso-lafupar-sulorebalebaguj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426971/normal_5fddcae356592.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bibobega.epizy.com/83549509489.pdfIn PDF document text
    • http://milodip.epizy.com/broiler_proof_baking_sheet.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB15 5004 bytes
SHA-256: 777661317f0d7e0bdad2a4d6bf9500a0e115667a23d46cb81935ec5c99b9b1c0
font_01_sfnt_off0000dc49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC49 10344 bytes
SHA-256: f12142f7777d84bf1309685fbdbf7001589182753d9393c90acef15a39fe0db7
font_02_sfnt_off0000ffed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFED 16092 bytes
SHA-256: c9557d91917e40dbb2ce09b7ef560a04a9a832ffe2ebcac6b50408a58351272e