Malicious PDF — malware analysis report

Static analysis result for SHA-256 06072570d169df8f…

MALICIOUS

PDF

72.6 KB Created: 2021-03-24 05:31:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: cd2cca830bf0abb8ba2d8c46a44a74d0 SHA-1: 99b0799072053913eb093c7c37b9748f7f902fba SHA-256: 06072570d169df8f8738ac93d37a7a008cd3ef3a8e5e3723b480198b4533f46a
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://mezovuduw.ru/strik?utm_term=how+to+turn+off+auto+answer+on+epson+wf-2540 PDF link annotation
    • https://cdn.sqhk.co/dunuxorigu/g3KhbyN/smart_tv_web_browser.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455403/normal_5fe106daf2584.pdfIn PDF document text
    • https://sarununow.weebly.com/uploads/1/3/4/3/134366188/vesupipurotolorotig.pdfIn PDF document text
    • http://pejokepi.mywebcommunity.org/27753706670.pdfIn PDF document text
    • https://cdn.sqhk.co/rorajakura/ghSnihi/draw_in_asl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369786/normal_601e72db383e9.pdfIn PDF document text
    • https://vokoziga.weebly.com/uploads/1/3/4/3/134389491/tedofanidog_teposot_jexisapazulol_pugovevopofa.pdfIn PDF document text
    • http://zitokujamu.mypressonline.com/83412808070.pdfIn PDF document text
    • https://jegivobepumo.weebly.com/uploads/1/3/4/4/134444156/makaru.pdfIn PDF document text
    • https://kibolimu.weebly.com/uploads/1/3/4/8/134872751/rizozetibegusipufan.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450632/normal_5ff162952f15b.pdfIn PDF document text
    • https://midumelu.weebly.com/uploads/1/3/4/3/134341446/balug.pdfIn PDF document text
    • http://gixepabu.22web.org/dotafonulofonanevulaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465392/normal_602ab5f77c492.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://surifetopene.epizy.com/management_reporting_wikipedia.pdfIn PDF document text
    • https://233b4d2f-9c44-4004-b776-098ebc281e6f.filesusr.com/ugd/7f980c_0f67cf5d49d34c2d8c187c03d030bd2a.pdf?index=trueIn PDF document text
    • https://e29a9437-b0a5-48a6-9afa-908397ce514a.filesusr.com/ugd/16a9c1_fefc8a74bb8745d797062e64e7645978.pdf?index=trueIn PDF document text
    • http://bizedesaxifu.onlinewebshop.net/xuganogerasuxenale.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_off0000dde9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE9 5432 bytes
SHA-256: 6b03ae9571f3e7c451af263b7cbf4eb84bfe3e67a82a640ed45d85b73589f8ce
font_01_sfnt_off0000f095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF095 10528 bytes
SHA-256: c4f1e499dce066ca5657b23c8fcfea74959d98f90984e86603e6a38e0bea8d9f

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