Malicious PDF — malware analysis report

Static analysis result for SHA-256 9406fe06a2569813…

MALICIOUS

PDF

70.3 KB Created: 2021-02-14 13:09:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 7db82f3474cdff4a4694bf6447a21174 SHA-1: 1d354c8d8ffa579d0b35ce2aac9ee432ebc981de SHA-256: 9406fe06a2569813850d4509e08d91ec63aa4e52100c61ae75e78423689b8951
126 Risk Score

Malware Insights

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

The PDF contains multiple external URIs and is flagged by ML and ClamAV as malicious phishing content. The document body, though heavily obfuscated, suggests a lure related to 'hacking'. The presence of numerous links to external domains, many of which are disposable or on suspicious hosting, indicates an attempt to redirect the user to potentially malicious sites.

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
  • 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://druttle.ru/wix?keyword=how+to+hack+hay+day+2020 PDF link annotation
    • https://cdn.sqhk.co/genamudazunu/7evhhxs/16045384185.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380392/normal_5fd084f750233.pdfIn PDF document text
    • https://soridafufunet.weebly.com/uploads/1/3/5/3/135308698/470678.pdfIn PDF document text
    • http://good-production9.site/brocade_300_firmwarebzo5l.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424361/normal_5fd97a2ec17c8.pdfIn PDF document text
    • https://cdn.sqhk.co/rosojolude/Gjbgjie/line_segment_calculator.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477163/normal_6004e0fbd21e3.pdfIn PDF document text
    • http://vovpomnim.ru/after_school_tutoring_curriculumg08yc.pdfIn PDF document text
    • http://tamakar.tech/92610167331jdjd0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sidesapamapa.epizy.com/turbo_vpn_cracked_apk_onhax.pdfIn PDF document text
    • http://vuzosaxa.epizy.com/worksheets_on_final_consonant_blends.pdfIn PDF document text
    • http://rokejunikutigid.rf.gd/buffalo_bills_latest_injury_report.pdfIn PDF document text
    • http://siwodonodefofo.epizy.com/app_messenger_for_android.pdfIn PDF document text
    • http://tivusanezidiv.rf.gd/busilomatubudovadoluzo.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_off0000d6fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6FC 5212 bytes
SHA-256: 040c69c2baf9c33ca9b561bb9c0d65f124ce7742c10df1a8cf42515988820b01
font_01_sfnt_off0000e8cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8CB 10444 bytes
SHA-256: 2e064297587b0effd105d5bd23443b88d05e3588c251bf8f45c47f2000dbfbf5

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