Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e180adfb11853ae…

MALICIOUS

PDF

87.7 KB Created: 2021-03-31 05:49:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1500fd77422933857fe11e924bde698d SHA-1: b1ae644dd55fd19f32dfddfbd8bce5aefc9ce24f SHA-256: 8e180adfb11853aed969f625bcf7ec1a2d30fadc0ca6020beafcbfacf6a816ca
156 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many of which are likely part of a link farm designed to manipulate search engine results. The primary malicious URL identified is https://xezojetit.ru/strik, which is likely used to redirect users to further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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=z+for+zachariah+ending+reddit
    • https://cdn.sqhk.co/sanevujaguda/vSgjKGu/lost_river_cave_bowling_green_ky_coupons.pdf
    • https://cdn.sqhk.co/divoxisig/vCYsvji/tobijesetukifazelebulo.pdf
    • http://mimivamefigupe.sportsontheweb.net/alphabet_practice_worksheets.pdf
    • https://cdn.sqhk.co/podidiwi/jjUH9gc/parallel_circuit_worksheet.pdf
    • https://cdn.sqhk.co/rabataxuvax/isXhfic/ghost_hunters_adventure_club_bandcamp.pdf
    • http://keluzizizeroki.getenjoyment.net/passive_voice_forms.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/a8178760-31c3-4b59-9bf3-022e6cc722af/buboxodu.pdf
    • https://s3.amazonaws.com/wiwuxot/pakumojifajekonuleka.pdf
    • https://s3.amazonaws.com/likerajatob/xosobekepowozuwi.pdf
    • https://b01ec662-dec5-4f54-b977-8708717d6054.filesusr.com/ugd/07e02c_31739aa61bcd4ca6bbbc5d151be61a28.pdf?index=true
    • https://f1801c53-b3f5-4b94-a9b3-4bb8eb376a66.filesusr.com/ugd/af633f_e3b4365d75e8443f9ea35fb0ea31e590.pdf?index=true
    • https://s3.amazonaws.com/pevuwarobuvowa/autodesk_homestyler_free_windows_7.pdf
    • https://uploads.strikinglycdn.com/files/af855465-6c45-4705-a22d-66b106931d2c/jufeluwuzagutofaraxifugor.pdf
    • https://s3.amazonaws.com/setigafat/aurora_teagarden_mysteries.pdf
    • https://s3.amazonaws.com/galinikagopit/dugivevefolowepexugibijis.pdf
    • https://uploads.strikinglycdn.com/files/24160c22-58a4-4b1d-ad98-5d4c982141c3/80137096653.pdf
    • https://uploads.strikinglycdn.com/files/16d29a0d-7406-411d-80eb-706380774145/boluvinotup.pdf
    • https://493f174a-a540-412c-bacb-e5b7b26cbfcf.filesusr.com/ugd/95bb70_415303e0ccb344379746facf8b79603a.pdf?index=true
    • https://7ed1f289-57d1-4e2a-9ee4-b64e0eb498cf.filesusr.com/ugd/13dc0c_028d5634a24f4e9785d44b4ea36a96e1.pdf?index=true
    • https://s3.amazonaws.com/satuja/53608795544.pdf
    • https://s3.amazonaws.com/nawuvud/34245259713.pdf
    • http://gixarewujedel.atwebpages.com/netil.pdf
    • 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_off0001189f.bin
8857438ccf84156ec7491d5222311a3ec88df518ee89668ba2bc2a27a7bea27a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1189F 5080 bytes
font_01_sfnt_off000129ea.bin
7fca89db98cbb79315d41771a4aea33330c3e778b866e4e23372b8e88b8114ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x129EA 12160 bytes

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