Malicious PDF — malware analysis report

Static analysis result for SHA-256 c90b3c27bc039ed6…

MALICIOUS

PDF

77.5 KB Created: 2021-03-08 10:07:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 8e9b3480c1a2db50cbdfd6f38c1382c5 SHA-1: fe85fb0d128ec38b7f838cac8e06302784632ee1 SHA-256: c90b3c27bc039ed6641901316e1709ca50533c12d4211746c83333dbd07e1117
214 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to redirector infrastructure or potentially malicious content. The heuristic firings indicate it is a malicious redirector and part of a link farm, suggesting an attempt to drive traffic to malicious sites. The ClamAV detection and ML classifier further support its malicious nature, likely for phishing or malware distribution.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/strik?utm_term=sub+zero+fridge+freezers+uk+prices In PDF document text
    • https://cdn.sqhk.co/furikute/fieeA9w/tamil_dubbed_movie_2020_free_download.pdfIn PDF document text
    • https://sojagimizalafar.weebly.com/uploads/1/3/5/3/135317111/821bd7e0d30.pdfIn PDF document text
    • https://cdn.sqhk.co/wagavoketi/ij44fGx/button_clicker_game_app.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477167/normal_6008b7c9abc73.pdfIn PDF document text
    • http://lajodibibodi.getenjoyment.net/65505931523.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453329/normal_6020968e25015.pdfIn PDF document text
    • https://mefupajudeto.weebly.com/uploads/1/3/4/8/134883840/4049558.pdfIn PDF document text
    • https://cdn.sqhk.co/litojavu/heQPBja/white_cardboard_sheets_near_me.pdfIn PDF document text
    • https://xaleratugigajij.weebly.com/uploads/1/3/4/6/134631249/ripowoxubofalotemawa.pdfIn PDF document text
    • https://gatepeduvemixif.weebly.com/uploads/1/3/4/6/134669895/xobumezemirekolo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f8340159-69ce-4309-ac43-521e9a8475b4.filesusr.com/ugd/bc0b97_ed57beaf38a34b04930865abf0687033.pdf?index=trueIn PDF document text
    • https://12c48f50-3553-44c7-a31c-19fc5df83d07.filesusr.com/ugd/7e0eb0_962402413aad488e9a9a10bb7bb0888a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/nakalez.pdfIn PDF document text
    • https://s3.amazonaws.com/timituvupame/46288569308.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/8978136275.pdfIn PDF document text
    • http://tediguku.atwebpages.com/suxajimat.pdfIn PDF document text
    • http://samajusinifako.atwebpages.com/how_hard_is_the_arborist_test.pdfIn PDF document text
    • https://68fdcf0a-b1f0-4758-9edf-48d2be6d990b.filesusr.com/ugd/ac51ce_0b734a614e9b4a59a390940fc53d79c0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/amd_adrenalin_drivers.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_off0000d7dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7DD 5440 bytes
SHA-256: 374699882c9fdbb025e18405f664b56ac35203db230b8e85f645d65710756b85
font_01_sfnt_off0000ea79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA79 10196 bytes
SHA-256: 33ffa34f8faa3afaf8168dbf53f3608b355ca46f1375a823ea28a1bbbed38900
font_02_sfnt_off00010daf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DAF 17680 bytes
SHA-256: 4070d43cb2b2fec8482b9f69ced7c9236075ddbb4f3ef0935026edfbda86c945

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