Malicious PDF — malware analysis report

Static analysis result for SHA-256 9813751ae04ae882…

MALICIOUS

PDF

59.5 KB Created: 2020-12-05 10:45:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 2b0f521456c856194b02e290b3a04947 SHA-1: 7094a555bccd6ecdb0513bf71fd4ee20918540d7 SHA-256: 9813751ae04ae882312b04e2029c0393fbb52800ae36a74efa90985afa559324
96 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating an embedded external URI and is flagged by a machine learning classifier and ClamAV as malicious. The document body, though heavily obfuscated, suggests a 'countdown timer' theme, likely a lure to direct the user to the malicious URL. No scripts were extracted, but the presence of an external URI points towards a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • 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://traffnew.ru/aws?utm_term=bomb+countdown+timer PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4418783/normal_5fb5a8d43000d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379380/normal_5fba7e6a7959e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467027/normal_5fc939d297fd7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374379/normal_5f91a7df6a45d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lulelepese/lord_of_the_rings_galadriel_fan_art.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/protein_shake_nutrition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fdd4c2a-ce5c-4adb-8887-f91d16455f20/job_satisfaction.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/miviginufelez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/baf1eba2-9d8e-47d7-88d6-9025b6bf37d5/co-ed_baby_shower_themes_girl.pdfIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/bulova_chronograph_watch_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/nalifij/dungeons_and_dragons_monster_manual_1e.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/37870200875.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_off0000aebe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEBE 4948 bytes
SHA-256: 5604743b895e78928cb7d1e41ef8cc441b1a613119a22985031d7d1077ddfab6
font_01_sfnt_off0000bf86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF86 9836 bytes
SHA-256: ed57acea969ca2e8ae218f0922873393b2dfeb084b3cf3d7737e5b74ad5c44da

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