Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd8c4e6688669ec3…

MALICIOUS

PDF

77.2 KB Created: 2021-03-29 00:40:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 205c1064e259d67b02bb6e94e28ed314 SHA-1: baad9323a35c672d4f23341e1797329578da0bbf SHA-256: dd8c4e6688669ec36c68c7f40ac42746fb712df2e16f7197447d213237374aa4
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan variant. It contains numerous embedded URLs pointing to disposable domains, suggesting a link farm or redirection mechanism to deliver malicious content. The document body, though heavily obfuscated, appears to reference legal statutes, likely as a lure to trick users into visiting the linked sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://fokemale.ru/strik?utm_term=law+of+property+act+1925+section+136 PDF link annotation
    • http://redirunna.xyz/63535534306v0hi1.pdfIn PDF document text
    • http://xruhdfo.site/4352149826642wvq.pdfIn PDF document text
    • http://alcexpress1.xyz/32151545559ycyb5.pdfIn PDF document text
    • http://tonagruz.ru/lefebuxupupost6og7.pdfIn PDF document text
    • http://prosale.company/weretibakonoa5q68.pdfIn PDF document text
    • http://takipleskazan.org/kuzalawuwerbvij.pdfIn PDF document text
    • http://tiximixisasosa.iblogger.org/andhra_pradesh_live_weather_report.pdfIn PDF document text
    • http://alisabor.design/abnormal_behavior_in_psychologyxrsbs.pdfIn PDF document text
    • http://instasurprise.online/pubexovezepegeliozerp.pdfIn PDF document text
    • http://distornyup.site/target_5_shelf_bookcase_instructionsyo7sn.pdfIn PDF document text
    • http://idealicaitaly.site/fajoniljee5q.pdfIn PDF document text
    • http://lnstagramcentre.net/convert_to_epub_format_free_downloadtjc57.pdfIn PDF document text
    • http://www19216801.site/781770269006tm6b.pdfIn PDF document text
    • http://mugedly.xyz/86028403721jilaa.pdfIn PDF document text
    • http://rkconstructionsucks.com/burezubefawosobagivimador4r2pr.pdfIn PDF document text
    • http://idealica-tufficiale.website/super_cat_tales_2_walkthrough_4-_6ydogj.pdfIn PDF document text
    • http://1s.london/reasons_why_we_study_psychology_of_religionrjar4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pizoxuwa.epizy.com/chittoor_jilla_weather_report.pdfIn PDF document text
    • http://menowawonip.rf.gd/zevivenukar.pdfIn PDF document text
    • http://karimelu.rf.gd/figutumadad.pdfIn PDF document text
    • http://getuweloniwa.rf.gd/relion_micro_instructions.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_off0000ee16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE16 5896 bytes
SHA-256: 5df4ca22dc6e4da32ddb7e5f3648778046c5060e26e375a61f9af59cd52b4b92
font_01_sfnt_off00010255.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10255 10852 bytes
SHA-256: 19983f008cc6ea3261de01b7ddab580b508ff52d383489f91a168904fc4f5059

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