Malicious PDF — malware analysis report

Static analysis result for SHA-256 0826b8b0f395e5e5…

MALICIOUS

PDF

75.8 KB Created: 2021-01-27 10:52:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: cc9cd621677efef57fd6f35d252e7b43 SHA-1: e0ddd0ad8d1f14522a08658ebf2d3f3c733b1a88 SHA-256: 0826b8b0f395e5e53411ab2621c34bb1e386e0a984b5cdd88506ab615030cb35
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/123?utm_term=julia+child+brownies PDF link annotation
    • https://cdn.sqhk.co/zujarepifej/97hdijc/black_christmas_stocking_holders.pdfIn PDF document text
    • https://cdn.sqhk.co/fekigimuzib/fgdLwrH/find_missing_money_florida.pdfIn PDF document text
    • https://cdn.sqhk.co/kasavakujosi/YtlOqja/accubattery_pro_apk_appvn.pdfIn PDF document text
    • https://cdn.sqhk.co/govazilose/hhhja74/directv_now_channels_by_zip_code.pdfIn PDF document text
    • https://cdn.sqhk.co/rijatazuga/gjaUbhg/7394743148.pdfIn PDF document text
    • https://cdn.sqhk.co/dasupejej/r7hf1j3/dceased_dc_comics_wikipedia.pdfIn PDF document text
    • https://cdn.sqhk.co/jogowijalaro/mDIvhij/hardcode_vr_game_download.pdfIn PDF document text
    • http://rakuxijewimafud.22web.org/boom_truck_daily_inspection_form.pdfIn PDF document text
    • https://cdn.sqhk.co/jozojonujaj/cgdosSM/tosogofedot.pdfIn PDF document text
    • http://nesapumedavemag.iblogger.org/vehicle_log_book_template.pdfIn PDF document text
    • http://wumofuzusagumo.22web.org/79455932841.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/tobaziw/samsung_android_version_7._0.pdfIn PDF document text
    • https://s3.amazonaws.com/laginekux/penn_foster_electrical_exam_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/sowirutelevolur/a_whirlwind_tour_of_python.pdfIn PDF document text
    • http://buwijakuwomem.rf.gd/tusamexo.pdfIn PDF document text
    • https://s3.amazonaws.com/wizedumi/59304248667.pdfIn PDF document text
    • http://renawexit.epizy.com/captain_marvel_wallpapers_for_android_mobile.pdfIn PDF document text
    • http://kakarares.epizy.com/james_cameron_s_avatar_android_game_free.pdfIn PDF document text
    • https://s3.amazonaws.com/memobofilenabon/santa_cruz_bronson_2015_size_guide.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFAD 5048 bytes
SHA-256: c6e7b839c0f5072f7aea73bb95bcf4496fdeb05c374f6b2551ac81dbf5b1fecc
font_01_sfnt_off0000f0c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C2 10296 bytes
SHA-256: 560c17f50a7e78a170cbceff334a5acc4eadb165c55b0fa4b2fbc8c0fdb9a7c2
font_02_sfnt_off00011414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11414 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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