Malicious PDF — malware analysis report

Static analysis result for SHA-256 510143ad604c9f81…

MALICIOUS

PDF

62.9 KB Created: 2021-02-16 13:13:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 8eec732b8e034e6aaaae6f047f866eb8 SHA-1: 412dc15e222b5628ec46ef7e734e3a1376e60b90 SHA-256: 510143ad604c9f810d2d172a0deda037007ac61f097260b19a5c972c8522fea3
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a machine learning classifier and ClamAV, indicating malicious intent. It contains numerous embedded URLs, many of which point to disposable domains and appear to be part of a link farm designed to redirect users. The document body, though heavily obfuscated, contains fragments suggesting it might be a lure related to account management or technical information, aiming to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 http://13millions-warzone.store/85143422219lttof.pdf In PDF document text
    • http://rewita.fun/whatsapp_apk_latest_version_for_blackberry_z10fhu57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382773/normal_6021642f79b13.pdfIn PDF document text
    • http://sdorovie-sustavi.xyz/103438560209oprh.pdfIn PDF document text
    • http://zelopaqq.xyz/defining_relative_clauses_exercises_pre-intermediatekj0vp.pdfIn PDF document text
    • http://design-kvartira.info/jakks_pacific_eyeclops_night_vision6rj63.pdfIn PDF document text
    • https://cdn.sqhk.co/konafomaz/VidicBn/wojevizewasen.pdfIn PDF document text
    • https://cdn.sqhk.co/tisumusef/e2w4idZ/she_keeps_talking_to_her_ex.pdfIn PDF document text
    • http://hookup757.fun/gracel_hmm_torrentzxcc2.pdfIn PDF document text
    • http://temppicture.xyz/alphabet_espagnol_illustr17u99.pdfIn PDF document text
    • https://cdn.sqhk.co/tatiderubota/brifgjz/ice_hockey_equipment_melbourne.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412382/normal_6011e75186d8b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467912/normal_5ff9aa04a493d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463286/normal_5fca91a600028.pdfIn PDF document text
    • http://natbeach.space/accounting_equation_and_balance_sheetraf81.pdfIn PDF document text
    • https://cdn.sqhk.co/vibisidumes/eghgiFa/rick_freeman_realtor.pdfIn PDF document text
    • http://good-production20.site/80606788113aztqa.pdfIn PDF document text
    • http://womenit.space/amc_tv_schedule_west_coast54re5.pdfIn PDF document text
    • http://smallita.space/xarikuzugobojarevafeb4zsi.pdfIn PDF document text
    • http://kamaz-ftc.com/how_to_print_with_ipadklx2t.pdfIn PDF document text
    • https://druttle.ru/strik?utm_term=how+do+i+change+my+adt+master+codePDF link annotation
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000bc3c.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000bc3c.bin)
    • 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 extracted file (font_00_sfnt_off0000bc3c.bin)

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bc3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC3C 5476 bytes
SHA-256: d9706340df364bf48d29c7982acadb25f48dffd963dbefee2aefddc029d805c8
font_01_sfnt_off0000cec6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEC6 9364 bytes
SHA-256: 1a3972abcdfa7d02652c970fd7daf06b37e13ce46c6600c4ecca5dc3c4bc7711

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