Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2a6c1ec13bf1c12…

MALICIOUS

PDF

78.8 KB Created: 2021-04-25 01:30:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 427fec77ee8a5ea4c6c9046b0e2ab059 SHA-1: 110084861f6d191c0d907f25676f245b5b77848b SHA-256: f2a6c1ec13bf1c12ff951e6b86fe03594721da5945f4943352d3cac711e325c7
156 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 0.9992

Heuristics 5

  • 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.
  • 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://jottigo.ru/strik?utm_term=how+to+get+a+calla+lily+to+bloom PDF link annotation
    • https://cdn.sqhk.co/ganuniwiku/wf2Fhap/mirin_replacement_halal.pdfIn PDF document text
    • http://gezowipefu.22web.org/autocad_2007_free_full_version.pdfIn PDF document text
    • http://wobodepubusa.22web.org/theme_of_post_colonialism_in_heart_of_darkness.pdfIn PDF document text
    • https://cdn.sqhk.co/zunesunatiri/gjHhcbD/napogu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425533/normal_5ff88bf13261e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425492/normal_600088f023560.pdfIn PDF document text
    • http://vuxiparami.22web.org/73057351742.pdfIn PDF document text
    • http://zuwixegugul.22web.org/ms_access_coding.pdfIn PDF document text
    • http://guvupokive.iblogger.org/metallica_symphony_orchestra_album_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405459/normal_5fcf1990512bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371786/normal_604b6fecea046.pdfIn PDF document text
    • http://kusowuwazugup.22web.org/97196149667.pdfIn PDF document text
    • https://cdn.sqhk.co/voxobidivel/tXu2fii/rokevux.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/wovugi/77019431496.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/kopenakiselediduzuj.pdfIn PDF document text
    • https://66f9544f-8325-470d-a543-c07714603334.filesusr.com/ugd/4b2642_79fd00ba35cf42e2b11ddb8a778e7a79.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/timituvupame/jexedik.pdfIn PDF document text
    • https://6363ce23-9394-4102-a476-7be320345719.filesusr.com/ugd/7c41c1_c35b62ebe7354178b745b6b1fe2ae2a6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bubodeliza/citroen_berlingo_2000_manual.pdfIn PDF document text
    • https://47e4df30-8702-49a4-8bd5-327e1546ff06.filesusr.com/ugd/379272_29d28c426d194869b0b065afba131616.pdf?index=trueIn PDF document text
    • http://fewuzefar.rf.gd/vemedibinafedezede.pdfIn PDF document text
    • http://tizafuj.epizy.com/crystal_reports_2011_sp12.pdfIn PDF document text
    • https://s3.amazonaws.com/pegozegi/unity_canvas_rect_transform_disabled.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_off0000f812.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF812 5140 bytes
SHA-256: 5c52972c700fa4c47131c115146f0f66f10f68980cbc6b92a962a6c545f5f58c
font_01_sfnt_off000109a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109A2 10492 bytes
SHA-256: 043dc1177c3e9d180ec3605aed68e462e34c97e08413e75a9cb10dafc1030baf

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