Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3bbc73951211e53…

MALICIOUS

PDF

92.5 KB Created: 2021-02-15 01:36:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7dd630eabec438e76e848cdc9c6ae366 SHA-1: 9f3aac1b8facfc24be99d6db48b39acbe066ff9f SHA-256: b3bbc73951211e5362d2fabaa742483e73649205b030e110f148231a7ba364a0
136 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of an embedded URI and the 'Password-protected archive lure' heuristic suggest the document is designed to trick users into downloading and opening a password-protected archive, which likely contains a secondary malicious payload. The document body, though heavily obfuscated, contains text related to religious services, potentially used as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://jacksth.ru/123?utm_term=hora+santa+eucaristica+por+los+enfermos
    • https://lojigimab.weebly.com/uploads/1/3/0/8/130814508/zunatewopejapo_xowurepo_xelig.pdf
    • http://megesodore.iblogger.org/xojigojes.pdf
    • http://topshops.website/financial_reporting_act_bangladesh0r5vw.pdf
    • http://vefuxeromuriwir.iblogger.org/aquatic_biomes_worksheet.pdf
    • http://fdvsefwfrw.space/34754058060swe8q.pdf
    • https://buwolipirawelas.weebly.com/uploads/1/3/0/8/130874522/jebep.pdf
    • https://pasojifet.weebly.com/uploads/1/3/0/7/130776368/3865229.pdf
    • http://triple-doska4.club/adobe_acrobat_dc_trial_offlinemwfd2.pdf
    • http://xipanekoxejup.iblogger.org/ragnarok_binkw32._dll.pdf
    • http://silkhfig.bid/17007786121l3um2.pdf
    • http://help-copyrightservice.xyz/601179244999yfk5.pdf
    • http://pobumur.iblogger.org/academic_cv_for_masters_application.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/panalipolifod/60797713951.pdf
    • https://s3.amazonaws.com/jifesu/73695495468.pdf
    • http://zevofelajasuz.epizy.com/45264182407.pdf
    • https://s3.amazonaws.com/vedexajawo/dixigopija.pdf
    • http://jetetekeputesi.epizy.com/sternal_wound_infection_guidelines.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011e4a.bin
e4d8aafb4d8cfb62f9a6519d1c12e80017ea9fc3add38378f4a19469d668451f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E4A 5004 bytes
font_01_sfnt_off00012f31.bin
5a4c52bdfc6da7d6b96910d5ee90ac67c0e88dc24d0039d0fde4590c883cefed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12F31 11848 bytes
font_02_sfnt_off00015523.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15523 4324 bytes

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