Malicious PDF — malware analysis report

Static analysis result for SHA-256 cccaa8e6f1ed9c6c…

MALICIOUS

PDF

77.4 KB Created: 2021-02-24 18:12:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 77244a479a3633cd5449f75c4fe1f4fd SHA-1: 2e6d5a337375efd8eca0ca2e71a35d5362caebe6 SHA-256: cccaa8e6f1ed9c6cc0fc1a46874c286f6a9909b9ffefdf3513d86c15c129d1ed
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/wix?keyword=best+manual+transmission+luxury+sedans PDF link annotation
    • http://zonerokemub.getenjoyment.net/38968833195.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498997/normal_6035763761503.pdfIn PDF document text
    • http://fasekafalig.scienceontheweb.net/what_are_the_environmental_indicators.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413017/normal_60088b134ccf4.pdfIn PDF document text
    • http://falorilipeb.mywebcommunity.org/new_york_dma.pdfIn PDF document text
    • https://cdn.sqhk.co/jezaziritav/QEotLja/37678460522.pdfIn PDF document text
    • http://taforojujutusig.mygamesonline.org/can_a_cracked_heat_exchanger_be_dangerous.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464082/normal_6027e97dca137.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415739/normal_5ff5dc60b8870.pdfIn PDF document text
    • http://golixudib.mypressonline.com/wufufulafojolixutafebi.pdfIn PDF document text
    • https://cdn.sqhk.co/turovonunido/cNEjbaN/pozitero.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422620/normal_5fff2728041cc.pdfIn PDF document text
    • https://cdn.sqhk.co/xadowififux/Uhj5cja/word_connect_game_2019.pdfIn PDF document text
    • http://bavewemelemare.iblogger.org/lowell_weather_report.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mizebud.rf.gd/1963628340.pdfIn PDF document text
    • http://vidugozu.atwebpages.com/lumawimejapuboruposoji.pdfIn PDF document text
    • http://gemakeruw.epizy.com/duvaritedu.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/rizukakijusida.pdfIn PDF document text
    • https://s3.amazonaws.com/zodererezuzuxi/48011263881.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/control_bluetooth_speaker_volume_with_firestick_remote.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C0 5192 bytes
SHA-256: d2f7675bb8624a40900d5f1f4e9f74aab6256478faf7832eb2e912c7641d9684
font_01_sfnt_off00010557.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10557 10160 bytes
SHA-256: 53e6ecce5bc439211d0bcce7cf8146c9946828a5530407cd4af7c22c9fb5d7c2

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