Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ae5e52dd265c16e…

MALICIOUS

PDF

166.7 KB Created: 2021-03-20 04:53:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 96c3a2b899e5c039f7ab8811de20d2dc SHA-1: 5ee38f6863e40789a8cd39e9cfd448042ccd6127 SHA-256: 7ae5e52dd265c16e57738ab5bc8b17c7bbd9c84b13016b8c0e1bbc30b04e3138
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by heuristics as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of external URIs suggests an attempt to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/award?keyword=ambiguous+genitalia+pdf PDF link annotation
    • http://gexopidikimo.mygamesonline.org/how_to_use_fresh_light_hair_dye_bleached.pdfIn PDF document text
    • http://kowojolajamuv.getenjoyment.net/mosenebi.pdfIn PDF document text
    • https://cdn.sqhk.co/tinolefowi/hGbyiev/tiny_tennis_racket.pdfIn PDF document text
    • http://tejidirexe.mywebcommunity.org/malupijatenigabezijok.pdfIn PDF document text
    • http://zoxuruje.sportsontheweb.net/catacumbas_de_roma.pdfIn PDF document text
    • http://kokolonesafu.getenjoyment.net/96738385948.pdfIn PDF document text
    • http://jokidinavefo.22web.org/pembuatan_bioetanol_dari_ampas_tebu.pdfIn PDF document text
    • http://kodutizaga.mywebcommunity.org/capgemini_aptitude_questions_and_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/rapawomo/fGidSyj/any_indoor_basketball_courts_near_me.pdfIn PDF document text
    • http://lirebuwoke.mygamesonline.org/nedibareregove.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://widurema.epizy.com/9868385538.pdfIn PDF document text
    • https://c039f79f-855f-4b64-8838-30138aeea086.filesusr.com/ugd/6b78cb_9bf4d0828ba44980b52d0c808d2556cd.pdf?index=trueIn PDF document text
    • https://436010f1-0dd7-4950-aec0-3bdf337573e8.filesusr.com/ugd/5a4c69_252a778ac8c94a4d85fea1f0c7c9cd46.pdf?index=trueIn PDF document text
    • http://wififeju.atwebpages.com/sikozuxifekakaxol.pdfIn PDF document text
    • http://netomadutimafe.onlinewebshop.net/bodybuilding_workout_plan_for_beginners.pdfIn PDF document text
    • https://a84030a7-2e48-4039-807a-383e2b7216cc.filesusr.com/ugd/c5d40f_3144e9b7ea864d53b8a35415d9118cae.pdf?index=trueIn PDF document text
    • http://xazujimex.rf.gd/doc_mcstuffins_bag_template.pdfIn PDF document text
    • http://mitekavutoz.rf.gd/the_chronicles_of_narnia_the_lion_the_witch_and_the_wardrobe_trailer_hd.pdfIn PDF document text
    • http://rixufesivefole.rf.gd/ziemia_planeta_ludzi_antoine_de_saint_exupry.pdfIn PDF document text
    • http://mudefikireneb.rf.gd/63037459750.pdfIn PDF document text
    • http://fobupozomorefiw.epizy.com/xijajuduwikol.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_off00023ed6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23ED6 5392 bytes
SHA-256: 9367fe54d65413b523d8ade8b8150a567eaa175bebf8a2081767c22ba0fd976f
font_01_sfnt_off00025119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25119 3740 bytes
SHA-256: e523397e5857c2d5c5fecd2a80646c1c213eda0f4d21d84623ffa6801ee2968b
font_02_sfnt_off00025eca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25ECA 15560 bytes
SHA-256: 71607b92526e71f780688e228867a039f58001edc8332139a585950143a33e50

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