Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a5ba2e1518afa32…

MALICIOUS

PDF

70.8 KB Created: 2021-03-15 16:00:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: e45b1f332035c9bca6ff61cab6fb076e SHA-1: d93819271d58f2ca2549c1ade53cb94e23b65af0 SHA-256: 8a5ba2e1518afa32c2a76b1be3cf17294ee11bf6a408d1cbb38ba07ab13db339
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URI pointing to a suspicious domain, identified as malicious by ClamAV and an ML classifier. The document body is heavily obfuscated, but the presence of the external URI suggests an attempt to redirect the user to a malicious site, likely for phishing or to download further payloads. No scripts were extracted from this sample.

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://xezojetit.ru/strik?utm_term=why+does+vera+lie+in+the+open+window PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4459468/normal_603d89e11732b.pdfIn PDF document text
    • https://cdn.sqhk.co/bexefoboxevi/ijgciaD/1864312571.pdfIn PDF document text
    • https://cdn.sqhk.co/putuziboki/gpNMItf/meteor_shower_august_2020_philippines.pdfIn PDF document text
    • http://rezubodojel.medianewsonline.com/49310854116.pdfIn PDF document text
    • https://cdn.sqhk.co/melobokodijo/hejigdH/tedudogirimute.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwafuwawen/fibVjiE/gesotusuzabodiperul.pdfIn PDF document text
    • http://gapagal.mywebcommunity.org/advanced_engineering_mathematics_zill_4th_edition.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369655/normal_6048d3a885140.pdfIn PDF document text
    • https://cdn.sqhk.co/gorisaburo/jdUhbi1/alan_walker_top_10_best_songs_download_pagalworld.pdfIn PDF document text
    • https://cdn.sqhk.co/rekosiseweno/azb5qN2/radiant_heat_panels_wall_mounted.pdfIn PDF document text
    • https://cdn.sqhk.co/kenipafitu/thiii2Z/55160174354.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/4c9eb070-de2d-4b1e-943b-9cbc145a9e03/is_ps4_vr_compatible_with_ps5.pdfIn PDF document text
    • https://s3.amazonaws.com/safago/29638605766.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79dc036e-1b15-479b-bad2-4bf5a18d1fda/ruletifo.pdfIn PDF document text
    • https://s3.amazonaws.com/tofizo/desifowej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30b6f334-983b-4a31-8550-1dff83343224/how_to_turn_on_sharp_air_conditioner_without_remote.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/gixofivabenekanimiji.pdfIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/xewobenesafunagopo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba706483-421b-487a-820e-c4a1d27c7efd/1817097684.pdfIn PDF document text
    • https://s3.amazonaws.com/werowibovezoje/wiputedawab.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_off0000d708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD708 5316 bytes
SHA-256: 5e6489fa6028599022387965df23705b6cf952abec30a935ded477aaf5fc88f1
font_01_sfnt_off0000e935.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE935 10848 bytes
SHA-256: 9481f03651721d94b3e97a0270ecde244c616d25ee532c21a40cc72949cb04d6

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