Malicious PDF — malware analysis report

Static analysis result for SHA-256 de871f9254d78b1b…

MALICIOUS

PDF

65.4 KB Created: 2021-02-19 19:05:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 981aa5a4abcaf2af20558896216bafb9 SHA-1: 76928a08376199985616a4e2a6e3182a57351d1c SHA-256: de871f9254d78b1b19da23737cfadd010d7ec5c8b1b5eef1444db1c14c1a886c
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by multiple heuristics and a machine learning classifier as malicious. It contains an embedded URL that leads to a suspicious domain, likely intended for phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to 'Nutone central vac hose parts'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/strik?utm_term=nutone+central+vac+hose+parts PDF link annotation
    • http://50offshop.pro/4846902134w9ofi.pdfIn PDF document text
    • http://jofarofuwudeveb.66ghz.com/80855546671.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499319/normal_60275d3eb5655.pdfIn PDF document text
    • http://yewes.fun/the_ultimate_gift_by_jim_stovall_free_downloadkwkac.pdfIn PDF document text
    • http://rorezorejadij.iblogger.org/25613176013.pdfIn PDF document text
    • http://healthytrands.com/rebuilding_database_ps4_risksvmhy6.pdfIn PDF document text
    • http://svoytrylend.xyz/thinkorswim_tutorial_options61hof.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tikofaketonub/gallstones_symptoms_merck_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/megulu/71072932024.pdfIn PDF document text
    • http://dovobol.epizy.com/32987442578.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/jitujodudapugisolofewetef.pdfIn PDF document text
    • http://rokusagotigenov.rf.gd/computer_institute_admission_form_format_in_word.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/hotspot_shield_full_apk.pdfIn PDF document text
    • http://sokivuj.epizy.com/wow_herbalism_guide_cataclysm_horde.pdfIn PDF document text
    • http://lufeneweb.epizy.com/frost_sullivan_automotive_report.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_off0000c343.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC343 5052 bytes
SHA-256: 76e56ad5b787ce81c224d89929a9c2fa42d839be8226fc9b53ed102c029a76fc
font_01_sfnt_off0000d474.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD474 10656 bytes
SHA-256: e15e9f652f929376a323a529335198fa88c06e4557ee39a3bf9c818c30145fd9

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