Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6fe1e901a2a2b46…

MALICIOUS

PDF

71.4 KB Created: 2021-02-24 00:05:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: a03abf442813f0f0996b3f38867df2bc SHA-1: 2c95d9d547db4fedbdc68a91627793cc4416bcc2 SHA-256: a6fe1e901a2a2b46181620a78d8114bdffed2933cba10fe3d87901cad1560c3d
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is highly indicative of a phishing or malware distribution attempt. ClamAV detection and ML classification further support its malicious nature. The document body, though heavily obfuscated, appears to be a lure related to a game item, likely intended to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/strik?utm_term=dark+souls+2+weaponsmith+ornifex+key PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4412377/normal_60137c2be8a28.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452386/normal_5ff9782d3160f.pdfIn PDF document text
    • https://cdn.sqhk.co/virurewev/e0X6tGP/80979353362.pdfIn PDF document text
    • http://fusitekive.iblogger.org/99704726011.pdfIn PDF document text
    • http://kuxalowakanuxed.iblogger.org/best_gear_ratio_for_saltwater_fishing.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393625/normal_5fcef69a6c46f.pdfIn PDF document text
    • https://cdn.sqhk.co/xadowififux/hdIgfyk/drag_racing_mobile_al.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421058/normal_5fdc35d768916.pdfIn PDF document text
    • http://likododolokopaj.iblogger.org/listening_c1_test_1_answers.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/palevijuj/ionic_vs_covalent_naming_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jedadokuti/bancomer_movil_apk_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/negonanopix/naruto_ninja_blazing_jp_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/paxunu/cello_sheet_music_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/vebibirefobonazorav.pdfIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/migojepalixejuvexojuz.pdfIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/what_is_guided_and_unguided_transmission_media.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/bujaxim.pdfIn PDF document text
    • https://s3.amazonaws.com/wurivuve/5683853747.pdfIn PDF document text
    • https://s3.amazonaws.com/nedijowewoded/how_does_a_pentode_tube_work.pdfIn PDF document text
    • http://muloluj.rf.gd/16243259951.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/37727353227.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
font_00_sfnt_off0000cbc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBC0 5480 bytes
SHA-256: 32fda477856c35e94334b9b6aaa8f5463a3483ffdcbedc47cceb4f9e20a1ddbf
font_01_sfnt_off0000de5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE5B 10524 bytes
SHA-256: bc03bc69e267febbf4d3aa37be6c8316fd832a1fb1ba04d9b45aae56a34148ba
font_02_sfnt_off0001022e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1022E 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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