Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc5bdcfc76fa75ab…

MALICIOUS

PDF

85.2 KB Created: 2021-03-24 07:40:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 51a7ee79ea16402be3e11c7f5f39a646 SHA-1: d60dc8ef8a806f95109a8df294d9d22ead11819a SHA-256: bc5bdcfc76fa75ab654f175998635f0deef80687652722b0d42a89c813d91363
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that points to a suspicious domain, identified by heuristics as potentially malicious and flagged by ML classifiers and ClamAV. The document body, though heavily obfuscated, contains keywords related to a pressure washer, suggesting a lure to trick users into visiting the malicious URL. No scripts were extracted, but the presence of an external URI and the overall detection by security tools indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://resalured.ru/strik?utm_term=dewalt+3600+psi+pressure+washer+oil+type PDF link annotation
    • http://pudobatawizubi.iblogger.org/42565675569.pdfIn PDF document text
    • https://cdn.sqhk.co/baxorurifina/XjaSNdp/railway_qr_code_id.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409098/normal_5fcdb35c20e66.pdfIn PDF document text
    • https://cdn.sqhk.co/nesuxozajek/cSgiji9/carfax_report_using_vin.pdfIn PDF document text
    • https://cdn.sqhk.co/labokezugumu/9Wgjeje/gun_shot_fire_war_game_free_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481988/normal_5fe3a1e928bf1.pdfIn PDF document text
    • https://cdn.sqhk.co/dikozogub/8oEySia/mini_dachshund_puppies_michigan.pdfIn PDF document text
    • https://cdn.sqhk.co/pamavunawi/iigehgd/suwowazoxaju.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://s3.amazonaws.com/xamibebulosaxug/free_skype_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/870d92b2-722f-4025-bf42-6054c2bb0d25/wubuw.pdfIn PDF document text
    • https://s3.amazonaws.com/lepefi/26826659136.pdfIn PDF document text
    • https://s3.amazonaws.com/taguxif/android_mobiles_under_7000.pdfIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/aws_firehose_lambda_transform.pdfIn PDF document text
    • https://s3.amazonaws.com/jexijer/modern_marvels_assembly_line_worksheet.pdfIn PDF document text
    • http://bifapekedareb.rf.gd/android_tv_box_bluetooth_keyboard_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39d2ce0b-0f03-4326-ad75-4f46682b7f16/46523103000.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/27322826868.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/56834397399.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4815f3d9-ca0e-4d83-8a82-a442defc8513/the_best_combat_knife_ever.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91171b6d-7f79-48bf-99d3-b6ee6f27c029/71794824981.pdfIn PDF document text
    • http://jukatuvofijeriw.rf.gd/77323214200.pdfIn PDF document text
    • http://razebegapusej.rf.gd/38046653602.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00011330.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11330 11124 bytes
SHA-256: f9a084f3b0a268b45dfcbaa679c60756b059f9e70f89ba9d060993a55dcdc833
font_00_sfnt_off000100e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E1 5336 bytes
SHA-256: d6016eacb609be2a1a228cb068944d5c27f6a106c22c837ac1abe6c0f09fec9b
font_02_sfnt_off00013886.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13886 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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