Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b6f8724d9f4b319…

MALICIOUS

PDF

80.5 KB Created: 2021-05-16 08:59:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 7f285d38d8cacea2f029c09ddd05dc26 SHA-1: 99afd12b3c12eaba2317f777241fe6e9bfd454c5 SHA-256: 8b6f8724d9f4b31999f6e8440b6a8e8aeb71dd9c466e81d5df796c3f6c2981dc
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. The document body, though heavily obfuscated, appears to be a lure related to a product manual, likely intended to trick the user into clicking the malicious link.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://dafemum.ru/strik?utm_term=viper+alarm+remote+7345v+manual In PDF document text
    • http://itmax.info/what_are_the_seven_spirits_of_god_referred_to_in_revelationst6hyy.pdfIn PDF document text
    • http://lnstagram-verifedbadge.com/communism_vs_socialism_vs_capitalism3ca8a.pdfIn PDF document text
    • http://robertferrell.net/hotel_management_ebookhneoq.pdfIn PDF document text
    • http://unlockdeals.shop/calibres_de_cables_electricosfidr9.pdfIn PDF document text
    • http://pe50off.pro/12925161104einni.pdfIn PDF document text
    • http://zomewegi.iblogger.org/mewiwofisajenigopexoj.pdfIn PDF document text
    • http://swiss-gear-top.xyz/lexatutapakorx26b6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vuginok.epizy.com/test_anxiety_and_academic_achievement.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/11150342686.pdfIn PDF document text
    • https://s3.amazonaws.com/tofizo/neco_gce_2019_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/3_main_types_of_rocks_worksheet.pdfIn PDF document text
    • http://nowutakifotekes.epizy.com/hwy_401_westbound_traffic_report.pdfIn PDF document text
    • http://lagadasisipas.rf.gd/police_reports_around_me.pdfIn PDF document text
    • http://dijesilelupav.epizy.com/pogisadipukoxubikulo.pdfIn PDF document text
    • http://tazomibege.epizy.com/14_de_febrero_historia.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/rigid_polyurethane_foam_sheets_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/poguvelefa/beatles_blackbird_tab.pdfIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/funny_personality_quiz.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/ge_profile_microwave_over_the_range_repair.pdfIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/mejekolodunosom.pdfIn PDF document text
    • http://mimojududike.epizy.com/17148546712.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_off0000f698.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF698 5268 bytes
SHA-256: cf79adcf899903cd440e4b5ccaa2e914c2c45782594adcfbf18d3d06912081d0
font_01_sfnt_off0001088a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1088A 12552 bytes
SHA-256: ad82a1e630792d1b02588741af0ff511c8035053b1ecbfc6bf3e3c848061ddef

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