Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c15746b5f56c527…

MALICIOUS

PDF

82.9 KB Created: 2021-01-06 02:33:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: e304e673ad444c5601f9ddb2fc575755 SHA-1: b157e94abd52821b2264bd467a8dfc7f6625997f SHA-256: 8c15746b5f56c527b444329f0774047d121a8e801780af9f28c5fbf656f7b8e5
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'traffset.ru', which is likely used for phishing or malware distribution. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, suggesting it might be a generated document used as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffset.ru/wb?keyword=civilization%206%20ps4%20expansions PDF link annotation
    • https://cdn.sqhk.co/rejibebadit/W2jfPKh/goniriretopegomeve.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366399/normal_5f872ceb3c280.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369629/normal_5faf4860aadfa.pdfIn PDF document text
    • https://cdn.sqhk.co/sazobenapur/gjKRMqy/6901796453.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480590/normal_5fbdb7aaf3da6.pdfIn PDF document text
    • https://cdn.sqhk.co/gituridewo/4fTgesg/xepopi.pdfIn PDF document text
    • https://cdn.sqhk.co/digiwejasipu/gdLfiif/tovoxiwitifalezo.pdfIn PDF document text
    • https://cdn.sqhk.co/tagorotage/igjahjl/lerelajusenop.pdfIn PDF document text
    • https://cdn.sqhk.co/zazerejaxu/hfhjKid/simple_cake_decoration_pics.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382407/normal_5fcc68415f351.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375203/normal_5fd636a5b4509.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412894/normal_5fe36278bf294.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://uploads.strikinglycdn.com/files/c8a8bfbd-3aa1-40cf-b73d-55bec3086d53/10470748047.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/camera_focus_sound_effect_free.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e189.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE189 4948 bytes
SHA-256: d6b559b0d7f647ee63c6e780549186ffafafe911253daf408dcbc16133ec4a2b
font_01_sfnt_off0000f27e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF27E 11708 bytes
SHA-256: 35dd500da91e61539782de1b6eb15ea039c031c6e670c60a20cf550c646b31e5
font_02_sfnt_off00011975.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11975 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e
font_03_sfnt_off00012ea5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EA5 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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