Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbf3ce8af63e86d7…

MALICIOUS

PDF

64.4 KB Created: 2020-12-22 22:07:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: aa3b0a23a0db35645e28a9f9205759d4 SHA-1: 06dae1634250b8a04789d22fe2eb9f4c5d1e599a SHA-256: dbf3ce8af63e86d7cbdb877eb5d0805d2d76fd39588b671add13c3a49091d982
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URL that leads to a phishing domain, disguised as a marriage annulment form. The presence of PDF-specific heuristics and the overall structure suggest it's designed to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffking.ru/aws?utm_term=florida+annulment+of+marriage+form PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367302/normal_5f9ab2611fc99.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405899/normal_5f91b3c190441.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/wozoxub/arunachal_pradesh_food_information.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/60228013406.pdfIn PDF document text
    • https://s3.amazonaws.com/dejolavubukugeb/messenger_lite_install_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6ae7e40-0fb1-4501-96d9-8bb40b6043c4/premier_credit_manager_login.pdfIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/42346190152.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2e6f62bbd74065813a7ba/t/5fc9d19dec1d586fb38e02e5/1607061917300/wink_emoji_using_keyboard.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc29a73239b0722913c2875/t/5fc82a1be21c7c679ad95f41/1606953500308/factory_farms_usda.pdfIn PDF document text
    • https://s3.amazonaws.com/kijelopazekune/dilivitazotim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d21d664-42be-4407-811a-8ab9a49c85d0/10795358055.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_off0000c361.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC361 5004 bytes
SHA-256: 93259fc4f02dea82ff352710bcd8716ff746e739e49da611dbd842d24001155b
font_01_sfnt_off0000d454.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD454 9692 bytes
SHA-256: a94b9ef5cdbfc37bc08d05b8f5b74b2064dff33333534fe122871fb67b3a93ae