Malicious PDF — malware analysis report

Static analysis result for SHA-256 887aa93f544e1319…

MALICIOUS

PDF

72.2 KB Created: 2021-03-17 13:34:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: b9673d19876f238618bba64fafff3ae5 SHA-1: 947e2beb854ff5039bc28a0fd0a5ad8b5da1b489 SHA-256: 887aa93f544e1319060605c3284a4d7341da34f53f02e565b1f68ed50c9aae78
156 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a link farm and has been flagged by a ML classifier and ClamAV as malicious. The embedded URL `https://mezovovuduw.ru/award?keyword=afl+fixture+2020+pdf+herald+sun` is likely used to redirect the user to a phishing or malware distribution site. Although no scripts were explicitly extracted, the PDF structure and heuristics suggest it's designed to exploit users through deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 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.
  • 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/award?keyword=afl+fixture+2020+pdf+herald+sun PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4452154/normal_60311120884f3.pdfIn PDF document text
    • https://cdn.sqhk.co/wobegideguxa/hjdBihr/96244404895.pdfIn PDF document text
    • http://fadulifakibul.medianewsonline.com/ducane_air_conditioner_cover.pdfIn PDF document text
    • https://cdn.sqhk.co/nimuxugemu/vyAzyhi/23672845265.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496153/normal_604f59fe99ea6.pdfIn PDF document text
    • http://tazanup.mypressonline.com/65515748060.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447903/normal_604cfc4070794.pdfIn PDF document text
    • https://cdn.sqhk.co/jelasusoved/ijgdSjf/download_stick_fight_online_mod_apk.pdfIn PDF document text
    • http://xasedogamif.mypressonline.com/dopilivowelujimivisu.pdfIn PDF document text
    • https://cdn.sqhk.co/dukosisevu/icggjbv/46934447505.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/dobesogum/bang_bang_title_song_320kbps.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/73543075108.pdfIn PDF document text
    • https://c83cbd6e-a134-4b49-ba12-49f24c654ad9.filesusr.com/ugd/904a8b_c4ecdd722f514e7f9791f4ccc41eb669.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fofeguj/jewoluxikiv.pdfIn PDF document text
    • https://d2ffd92d-ad89-4e9b-8359-126286817a3c.filesusr.com/ugd/dd9784_92b76b8b1c144da294e80722cdb9d8e6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/geraromu/king_of_my_heart_deutsch_chords_piano.pdfIn PDF document text
    • https://2d130471-2a64-48ba-87cf-8f1e86c6acad.filesusr.com/ugd/9c43ec_1bb7bb40b6fe49f38467a44bc657b432.pdf?index=trueIn PDF document text
    • https://a12a05ab-6462-4855-b086-b0a2a961d6d8.filesusr.com/ugd/2c76f4_58c5a239d9644348a0ba5dd78319fef7.pdf?index=trueIn PDF document text
    • https://32cf4326-ba62-484c-a3ca-05d02c2dd2e5.filesusr.com/ugd/0b46e6_64e2e22386dc457285bde65f8228810b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bezorito/simple_budget_template.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/9962115362.pdfIn PDF document text
    • https://s3.amazonaws.com/dudurat/bogivupa.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_off0000d192.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD192 5232 bytes
SHA-256: af19159e396bc432c51ce23e7f704b98a48c478b825e56af36d448a864926ae1
font_01_sfnt_off0000e34b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE34B 9964 bytes
SHA-256: 5446f1712fcd5cb5b75a654515792b89c23f23ab862b98b6a8302eb246e2b48f
font_02_sfnt_off00010558.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10558 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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