Malicious PDF — malware analysis report

Static analysis result for SHA-256 b94b469f684c8b01…

MALICIOUS

PDF

78.0 KB Created: 2021-03-02 01:53:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 765e7abfbd5284a9d4992a0f693e168f SHA-1: ae0dc82a77c8ff4ab93735772b6ebaca55cd881f SHA-256: b94b469f684c8b0103261325cecd467616af49b66345c0ed2ca56a5754319a43
126 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs, such as https://mezovuduw.ru/wix?keyword=gamecube+loader+para+wii, are likely used to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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/wix?keyword=gamecube+loader+para+wii PDF link annotation
    • https://zobegutibeg.weebly.com/uploads/1/3/4/9/134902349/lusivazef_dolovijanebuf_vijapojekow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377704/normal_600a5ecba95d0.pdfIn PDF document text
    • https://cdn.sqhk.co/joxipadij/bVAMjgw/tapp_teach_on_the_go.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489615/normal_600dd7f285d5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369161/normal_603d7cb39f33b.pdfIn PDF document text
    • https://zudovizu.weebly.com/uploads/1/3/4/3/134338339/vapanilaxaju.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393626/normal_5ff5bcc807b0d.pdfIn PDF document text
    • http://gekodejevotug.medianewsonline.com/renorawezixelonanuled.pdfIn PDF document text
    • https://gomosonu.weebly.com/uploads/1/3/2/7/132712120/930963f6b2.pdfIn PDF document text
    • http://jedusajinud.mygamesonline.org/34667487852.pdfIn PDF document text
    • https://cdn.sqhk.co/libudezetuv/eAjDPHT/best_photo_transfer_ios_app.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481164/normal_5fc98dcd65500.pdfIn PDF document text
    • https://cdn.sqhk.co/susojitigi/hgnijji/dollar_tree_hours_near_me.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/83891356759.pdfIn PDF document text
    • http://mujebik.atwebpages.com/66118498221.pdfIn PDF document text
    • https://s3.amazonaws.com/zabejuvijolu/celebrate_recovery_testimonies_to_go.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/adapter_iphone_to_android.pdfIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/ridunal.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_off0000e859.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE859 5000 bytes
SHA-256: 123641512424ce11e8c59baff135ee41b0de32bfc4cb5a107b4267be5a4fa600
font_01_sfnt_off0000f95f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF95F 10240 bytes
SHA-256: 215f987581758de4a3bdae3dc079be4b340cb45e4d615932122a8011b0e89b5e
font_02_sfnt_off00011c84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C84 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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