Malicious PDF — malware analysis report

Static analysis result for SHA-256 776dcf68232333c2…

MALICIOUS

PDF

72.9 KB Created: 2021-04-03 20:44:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6009c591836d1fc7f3338e1aedcc2a0 SHA-1: 94d87cca715c18fc69499725797d3f13d9589bac SHA-256: 776dcf68232333c2e9bec832788da30ebe43702370a7b1ec92007d5f678a3c25
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to other PDF files, suggesting a link farm or a method to distribute further malicious content. The presence of a URL related to printer drivers indicates a lure to trick users into downloading potentially harmful files. ClamAV and ML classifiers strongly indicate maliciousness, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=hp+laserjet+p4015x+driver+windows+xp
    • https://gozezitigaja.weebly.com/uploads/1/3/4/3/134340412/kisexafurodor.pdf
    • https://volinamonapefez.weebly.com/uploads/1/3/4/4/134494747/bodisu_zeman_xojoga.pdf
    • https://cdn-cms.f-static.net/uploads/4462732/normal_601845223b05f.pdf
    • http://sunazeremitiwu.mypressonline.com/business_level_strategy_examples.pdf
    • https://cdn-cms.f-static.net/uploads/4480744/normal_6013c76893704.pdf
    • https://cdn.sqhk.co/misumirotoj/egjSp8L/91025498492.pdf
    • https://cdn.sqhk.co/sobupepokor/eQKhhzu/diy_dice_tray_cigar_box.pdf
    • http://zipubezexupoka.mywebcommunity.org/72411798430.pdf
    • https://cdn.sqhk.co/nepodowu/8UBP1BD/descargar_boxing_fighting_clash_hackeado.pdf
    • https://static.s123-cdn-static.com/uploads/4486965/normal_5ffe79a1c0989.pdf
    • https://static.s123-cdn-static.com/uploads/4460045/normal_5fef633bf277c.pdf
    • https://cdn-cms.f-static.net/uploads/4496616/normal_6029146c48e1b.pdf
    • https://cdn.sqhk.co/rolileduvof/gfjigeq/calculator_online_free_use.pdf
    • https://cdn.sqhk.co/riroxale/mief7Yk/33371796978.pdf
    • https://cdn.sqhk.co/kutajanode/hdhaZOl/dragon_bash_pinata_locations.pdf
    • https://malabukepi.weebly.com/uploads/1/3/0/9/130969546/2365761.pdf
    • https://cdn.sqhk.co/wojusipi/h6Iiiii/rasabufinafodonorabiririf.pdf
    • https://static.s123-cdn-static.com/uploads/4426679/normal_5fdf9e0311ad4.pdf
    • https://cdn-cms.f-static.net/uploads/4477139/normal_605aef48b31e7.pdf
    • https://luzulobopado.weebly.com/uploads/1/3/2/6/132681737/6324541.pdf
    • https://cdn-cms.f-static.net/uploads/4449615/normal_604a77a7c8227.pdf
    • https://static.s123-cdn-static.com/uploads/4393348/normal_5ff034238e2d7.pdf
    • https://cdn.sqhk.co/bogulevim/58A7DHV/46521148175.pdf
    • http://wusator.mygamesonline.org/apostolic_anointing_spiritual_warfare.pdf
    • https://cdn.sqhk.co/kimefutif/Cushijj/download_tower_crush_mod_apk_rexdl.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de42.bin
6f51210c72683f448d91f9302e5118c187e9340da32cb98f002fcf353c8a9617		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE42 5616 bytes
font_01_sfnt_off0000f189.bin
7126328cb4a4ba96a71faa1b248d4c427fe686373d680ac8f48f4a57f76c5ca7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF189 10604 bytes

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