Malicious PDF — malware analysis report

Static analysis result for SHA-256 6deb66cd74a00e70…

MALICIOUS

PDF

100.5 KB Created: 2021-05-09 15:13:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 4d20da633c21e0d88d9c2e342e88baca SHA-1: 226a0ae61cb3bb40717e6f9c1fa29c2850a8f71d SHA-256: 6deb66cd74a00e706f25b9eb79284aa585933a4bd2b682daee4ceb4e9d222db9
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the presence of external URIs and the 'link farm' heuristic point towards an attack pattern designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://xezojetit.ru/strik?utm_term=metal+gear+solid+3+snake+eater+remake PDF link annotation
    • http://vumubolerik.iblogger.org/bosepixazaveralutiza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420764/normal_606c5d32eb603.pdfIn PDF document text
    • https://cdn.sqhk.co/kegetaxob/BkIhbhb/75179943188.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373008/normal_600fbb17514a9.pdfIn PDF document text
    • https://cdn.sqhk.co/dawadetugas/ljjFjfz/rotetutodopabin.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471704/normal_5feec61caadcb.pdfIn PDF document text
    • https://cdn.sqhk.co/rajemaramiw/1gdif8x/cheap_second_hand_clothes_online_uk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409627/normal_605399d87b50d.pdfIn PDF document text
    • https://dinoromakutaxe.weebly.com/uploads/1/3/4/4/134479472/dozit-selazokogef.pdfIn PDF document text
    • https://cdn.sqhk.co/fapolokid/DD3hfEZ/rokukekixulaxitijeveje.pdfIn PDF document text
    • https://kixixowagixu.weebly.com/uploads/1/3/2/7/132710794/121eb0efb281.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://posujozu.epizy.com/fokikuwevi.pdfIn PDF document text
    • https://a0a5ada1-270c-452f-b092-d943fc6f0dc0.filesusr.com/ugd/306762_3e4eb48c81cc46f0a1d4535a8980fd1e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xuzakob/19257961182.pdfIn PDF document text
    • https://9305c775-266c-4126-9ef9-90a5cffee957.filesusr.com/ugd/c3f88d_39ba10a27c2f4dbd81992056762666a4.pdf?index=trueIn PDF document text
    • http://nadidobuwexep.rf.gd/types_of_communication_books.pdfIn PDF document text
    • https://8c17aa34-c454-4d6c-a218-8929c845e329.filesusr.com/ugd/808cd0_27d356dc7faa4bbfb84c12266ef43ff5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/33818569073.pdfIn PDF document text
    • http://povalimokuwov.rf.gd/17055851998.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013584.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13584 5460 bytes
SHA-256: a6bf95de740b21673ba743247680a5ca68673b4469588355ab2df63ed420fe30
font_01_sfnt_off0001486f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1486F 5376 bytes
SHA-256: 3728fbce76585c7e2aba327116328a406f0c02b24fd6fbc3683ebd5194d2a8fb
font_02_sfnt_off00015ab3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15AB3 12112 bytes
SHA-256: fe9e48e6065667cf891540131512e35539368feb8f11b8b3d1eaf0ce3f2c3448

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