Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ec63bf739cb4c18…

MALICIOUS

PDF

69.7 KB Created: 2020-11-18 16:35:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 68fa622afbdcf4a6d09a7bcc77568c60 SHA-1: 79601e4bc8bd35335a84e81302b32f5ea8845efa SHA-256: 0ec63bf739cb4c18ef611e0e29d8686e059d1c85f7fc1150289c4aae8cd6a076
96 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 URL, 'https://trafficel.ru/123?utm_term=heal+your+face', which is likely the primary lure for the phishing attempt. The document body, though heavily obfuscated, contains text related to 'Heal your face', reinforcing the phishing pretext.

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://trafficel.ru/123?utm_term=heal+your+face PDF link annotation
    • https://tumovapexawezan.weebly.com/uploads/1/3/1/3/131398362/9e4d39985ed0e2.pdfIn PDF document text
    • https://buwabasowo.weebly.com/uploads/1/3/4/3/134353515/a9c7786b83545c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453337/normal_5fad98a53366f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387421/normal_5f8fc5a151885.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413851/normal_5f9a43e5a3263.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379486/normal_5f8e9bc825f12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454677/normal_5fada7b0b29c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366408/normal_5f87adbcd3cd4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/98781608-331c-42bc-8d34-ade8c7bbf377/mount_olive_cemetery_chicago.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6d8cce3-ed46-4a12-8b7f-bdac623f98c3/78543982475.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/defomokeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25f286b2-05d7-4130-bdad-4f78b48b18f6/damefojajewa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18cbd04a-a1c4-4ed4-b80f-6c3c7c73a0f7/gudekesedeseki.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/promo_code_for_chicago_manual_of_style.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e426b5ff-f34b-41ec-8b69-be04a6ddd738/dumegogene.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3d05cf0-895a-41e8-b66d-4f43a6704811/32753995264.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_off0000d4a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4A8 4760 bytes
SHA-256: f71f39c9875b1e864b5049cfb3a35e46f7dfd7d79af22616d47e3f7bfc417810
font_01_sfnt_off0000e4f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F4 10920 bytes
SHA-256: 76f51022b78efa646807ad3635393a74837964c1a16ef1600d584ca8190f3245

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