Malicious PDF — malware analysis report

Static analysis result for SHA-256 05d8aa2f8e2c8c6f…

MALICIOUS

PDF

70.7 KB Created: 2020-12-31 03:03:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 2337e964140f68249ff79a5c753bea55 SHA-1: 90c5fa0d85418bf57d10942ba51b60cdf4422096 SHA-256: 05d8aa2f8e2c8c6f22ef7cdb4dc306df007bac597c6af1340a05ba41cb5e4c9c
104 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains an embedded URL that is likely used for phishing or malware distribution, as indicated by the ML classifier and ClamAV detection. The document body, though heavily obfuscated, appears to be a lure related to 'Monster truck videos for toddler', aiming to trick users into clicking the malicious link. No scripts were extracted, but the presence of external URIs and the overall detection profile strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://traffine.ru/strik?utm_term=monster+truck+videos+for+toddler PDF link annotation
    • https://cdn.sqhk.co/nopawuwam/dichgcy/cfo_jobs_nyc_glassdoor.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370051/normal_5fcf1b11825ca.pdfIn PDF document text
    • https://cdn.sqhk.co/pezolaje/igEhjjD/47013907401.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502236/normal_5fafee4241ab8.pdfIn PDF document text
    • https://cdn.sqhk.co/nopawuwam/MwjaRja/jizabonuvimutanid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424013/normal_5fa6804cd31ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416125/normal_5fb4e5ba2b6a1.pdfIn PDF document text
    • https://cdn.sqhk.co/pufowuvikij/hiCheif/sebanusirowusazajasofir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415304/normal_5fa1523762e99.pdfIn PDF document text
    • https://cdn.sqhk.co/kuruwoke/OKiajfx/dragon_racer_maze.pdfIn PDF document text
    • https://cdn.sqhk.co/fifapupifig/IwihUCo/kratos_god_of_war_hot_toys.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392862/normal_5f9ee6cfc5d75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365602/normal_5fc094ec5c283.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdb23ff6-8cce-4a10-88bd-d1954eb79e22/wiworigopakeralokomemal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a77530d-9a75-48eb-bd63-05f9487910c6/farusiwabazokunamixer.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_off0000d93a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD93A 4936 bytes
SHA-256: a375141b6c2a53a6f7e3cbb10e896464b10a0449263a64e3c0206671cae05c35
font_01_sfnt_off0000ea30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA30 10688 bytes
SHA-256: 9eb0cbffe9cfc15f760b2f53f6330131b466fb4d13e9ad5f94d13df022756269

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