Malicious PDF — malware analysis report

Static analysis result for SHA-256 86e4b8df340852df…

MALICIOUS

PDF

439.9 KB Created: 2021-04-29 16:54:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 744ff4853b619c17f75996b89835a45f SHA-1: 9f1ce46063482d5036d429399f77500434f6ff74 SHA-256: 86e4b8df340852df0a1382fa709e5265319cc9742371f2647130a3ed344a86f5
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL points to a suspicious domain, suggesting it's used for phishing or to serve a secondary payload. The document body, though heavily obfuscated, contains text that appears to be a lure for a 'player's guide', aligning with common social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9871

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://xezojetit.ru/strik?utm_term=player%2527s+guide+to+faerun+web+enhancement PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4410000/normal_603068ed7a307.pdfIn PDF document text
    • http://help-copyrighteamservice.com/list_of_protein_rich_food_veg_in_indiaqzcyy.pdfIn PDF document text
    • http://myfirstsite.xyz/how_to_pass_the_arkansas_permit_test4y99o.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384159/normal_6023eaa1ac24d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418762/normal_602c09a1c771a.pdfIn PDF document text
    • http://finansi-7.online/76075985949erue5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4531626/normal_600dd6a874b40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401519/normal_606a04a9e651a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401985/normal_603ee7302010a.pdfIn PDF document text
    • http://good-production17.site/surenexuctspc.pdfIn PDF document text
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://45f0f727-c607-4398-b3b7-8b42e23b21b2.filesusr.com/ugd/0a84ca_ea05bcaf50f9406080bd9c25d3e487a6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/af4b2df2-0b46-4d19-9558-9fafad3ff937/2013_jeep_grand_cherokee_overland_5.7_hemi_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dde6d51d-b983-45c3-83cf-8218d23858f8/why_is_my_dryer_not_blowing_hot_air.pdfIn PDF document text
    • https://s3.amazonaws.com/miledu/avengers_age_of_ultron_script.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/nullstellen_mit_maple.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/bibane.pdfIn PDF document text
    • https://s3.amazonaws.com/tikofaketonub/71877742513.pdfIn PDF document text
    • https://4bf641bf-117a-4913-931f-55e49063997f.filesusr.com/ugd/5befcb_36c6e43cb1914a4cbb063d13f038564a.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000683ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x683AD 5684 bytes
SHA-256: c54fa1ca8cd7724957c87afb53eb6e5b5f27d3fd9524bcd4ed86e8d590fbe63a
font_01_sfnt_off000696ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x696ED 12668 bytes
SHA-256: 2d1241209bf4ff00702687996c6a7336b9e46304b1321c17d99927aa22c7881c
font_02_sfnt_off0006c0e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C0E9 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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