Malicious PDF — malware analysis report

Static analysis result for SHA-256 90f1ddd8fcb943c4…

MALICIOUS

PDF

68.7 KB Created: 2020-12-21 23:00:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: e23d04c27f374bc0c2beb4e17c7b909e SHA-1: 03f426da5bc655e378217ef1586f39e4a1a27297 SHA-256: 90f1ddd8fcb943c46dc78ec870cf0d1ef1229ebaa6198bc243b0076e6dbb5042
96 Risk Score

Malware Insights

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

The PDF file contains a URL that leads to a phishing attempt, disguised as a guide for obtaining in-game items. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic point towards a phishing attack, likely initiated via a spearphishing attachment.

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://trafftec.ru/123?utm_term=how+to+get+gunpowder+minecraft PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4414167/normal_5fcfae25ad5fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388620/normal_5f8db395abdba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446507/normal_5fc3805cc4116.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455642/normal_5fcaa6913cc32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490934/normal_5faaf300cad25.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445735/normal_5fda8e60a5b9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393521/normal_5fbecf594678f.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/088bf01f-9de8-41da-b4af-5869dd6b25f5/gearwrench_ratcheting_wrench_set_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9cd26b5-f264-40bf-98e5-0a1ab7871a8f/quest_3_listening_and_speaking.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ff36e35-1c4b-4ea4-b99a-ab67c7fc968f/97879127646.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdd55bb6394b41d64250a19/t/5fddf074f3f88b619ffd5a58/1608380533318/9751996942.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0948f81f-1b17-4d43-a724-ae331b89bbae/telugu_stories_for_kids-panchatantra.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50a70f0d-c15c-4a9f-a51a-8f70a68a051f/koviwumojovukobutapo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe8d9a3e-2371-4b6a-9963-a043edef7cd5/the_logic_of_scientific_discovery.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_off0000d008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD008 5316 bytes
SHA-256: 8751a803826398a1b8e0a5eb2577272a6897dbb825edb0295532bcaada8bac6a
font_01_sfnt_off0000e221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE221 10412 bytes
SHA-256: fdab25cece1ea6354969287b6b1ba99719ffea11b8e0849bc83cd7dd6f7553a7

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