Malicious PDF — malware analysis report

Static analysis result for SHA-256 5647b94e9049d643…

MALICIOUS

PDF

60.2 KB Created: 2020-11-29 21:51:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: e9483b5d627e9ac8796f62e65e9b457c SHA-1: 9c5db9c28ba3540878c10f39e2d31b90c6e61fb6 SHA-256: 5647b94e9049d643804b540ffabe6585d6263fd2650a271d1779ff87fa5c4160
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified by ClamAV as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to 'crossword puzzle answers'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect the user to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafffi.ru/strik?utm_term=elevation+western+united+states+crossword+puzzle+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4427514/normal_5fb676555c060.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389571/normal_5f9b940c7ab35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426682/normal_5f9b490349295.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/6bc4d882-1b4a-47bf-b6d3-ea896b826363/single_muscle_twitch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9540476d-3b5f-4c11-9fe1-7819f63fdbe2/11514150516.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efd30ec3-8e74-4fee-971e-7d292ca6f24a/cazal_905_sunglasses_replica.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/941c4b0b-5f4e-475a-a7f2-5d6954403c79/riturid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d0e54a8-5a14-43f6-86e4-9c8bf0510fd1/gegazedipemakefetiwo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a66d390-f4df-4926-b577-9d222003eb63/69212148125.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34239a77-0424-4668-b405-128b96bde354/english_prepositions_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40a23075-b17b-4f7e-b53b-8cc9e2b55b90/data_analytics_lifecycle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/101b0640-b806-488d-a0e8-f65b96188a14/last_will_and_testament_nc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57f8ec6e-6b9c-4071-81a6-f140d6195f22/85085629397.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_off0000af6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF6B 5228 bytes
SHA-256: 82340f4ff471c557badb5c1d5bae839a658bc3f1d6491867ac48a0e2b7af9287
font_01_sfnt_off0000c160.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC160 10008 bytes
SHA-256: 868abd6de58da8fc929adb84cb4efab1abf2f114ba82f0892f02c2260b4a138f

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