Malicious PDF — malware analysis report

Static analysis result for SHA-256 779fae7f71b1603f…

MALICIOUS

PDF

71.5 KB Created: 2020-11-24 17:50:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: b18f1a6de71e72242c065aba85c8bd07 SHA-1: 901bc65aeb7945f32bda6c73d54d06db9ad04210 SHA-256: 779fae7f71b1603f96c6c21b20b666399041c3a2e1f66c8aafc827ce5a952c82
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafficel.ru/123?utm_term=long+haired+mini+dachshund+for+sale+oklahoma PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4410414/normal_5fad530042faf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469643/normal_5fb00aec8247d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487431/normal_5fad7931e56fd.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/pivetuzadujo/free_automatic_call_recorder_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/64610165227.pdfIn PDF document text
    • https://s3.amazonaws.com/safago/password_hacker_app_for_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db2a5702-9c33-461a-b03c-c61622bbe92d/autodesk_sketchbook_brushes_for_procreate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35e9faff-30f4-4d97-b65c-8b6052d04128/65944056288.pdfIn PDF document text
    • https://s3.amazonaws.com/rakonezum/regency_gas_fireplace_insert_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f00e6452-955d-4355-adc5-182219ea1668/30171170299.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d7a5ada-61cd-4fb2-8f99-d400392c4053/57288067405.pdfIn PDF document text
    • https://s3.amazonaws.com/rufonali/manual_bookkeeping_for_small_business.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/12226673041.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_off0000d5aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5AA 5440 bytes
SHA-256: 8a5614b6510f123048ff819f5ec50c1cd636de7baf889b9bf682c54330499e24
font_01_sfnt_off0000e80a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE80A 11492 bytes
SHA-256: ab3f95563c912077ad3e0e29762d484b4d51d8d788bfb0b5bd71dc8a2fd81c54