Malicious PDF — malware analysis report

Static analysis result for SHA-256 c44a251e22205b14…

MALICIOUS

PDF

64.3 KB Created: 2020-12-27 16:42:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 2c04dbaa7ea208c8b2cb970639bf536b SHA-1: 12fb1935a8c70732f5ac0fa6cb392be7fdcf10f9 SHA-256: c44a251e22205b14ee5b7584a0e3cebcd74d6edcf1065fdc2b4958a3e5f8e9fc
104 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI that leads to a suspicious domain, likely intended to deliver a secondary payload or redirect the user to a phishing site. The presence of a 'download button' heuristic further supports the phishing lure.

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffset.ru/strik?utm_term=sms+serial+song+ringtone+marathi PDF link annotation
    • https://cdn.sqhk.co/lilapanorup/9icgcij/kamujarububomoditaw.pdfIn PDF document text
    • https://cdn.sqhk.co/vipabumumiw/mPhdOji/86191899052.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379970/normal_5fa42c93f3d8d.pdfIn PDF document text
    • https://cdn.sqhk.co/zolaxadivowe/ifjeeii/skulduggery_meaning_and_examples.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472783/normal_5fa9b94bee42c.pdfIn PDF document text
    • https://cdn.sqhk.co/letowajaf/ghhcRz2/botisajiwi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385887/normal_5fc5c53543b85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415936/normal_5f9610469f9a5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419195/normal_5fe44a07aa218.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/napisakaluja/baximovi.pdfIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/mla_formatting_website_citation.pdfIn PDF document text
    • https://s3.amazonaws.com/devuxuzejozam/golifewewokebino.pdfIn PDF document text
    • https://s3.amazonaws.com/gozifep/pulogidu.pdfIn PDF document text
    • https://s3.amazonaws.com/sefipa/vilajolilumebexi.pdfIn PDF document text
    • https://s3.amazonaws.com/libeganot/ff14_wt_stand_for.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_off0000b1d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1D3 4988 bytes
SHA-256: 773c28c1d218603d49c5b0608b244195c667a35ca4ed55e682e1791dce8ff3f8
font_01_sfnt_off0000c27e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC27E 10880 bytes
SHA-256: 7d695d8f024819d89203ce673a81ee2dc5329e97530ef7b15358c8f8ab67734f
font_02_sfnt_off0000e62f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE62F 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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