Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cec664b7c0322b9…

MALICIOUS

PDF

84.6 KB Created: 2021-03-14 09:22:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 29cea3b0b610a46c5ea3bb7f67a00c03 SHA-1: b8ace456d67c0d9b9add7186d294b9de2f95e0bc SHA-256: 3cec664b7c0322b99eaa2ff2c37fff6bfd75f6033b26afad8b85709910a57488
166 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a password-protected-archive lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://leonvi.ru/strik?utm_term=storcenter+ix2-200+firmware+download PDF link annotation
    • https://cdn.sqhk.co/xipepovivik/Ghahgih/pifibisogomozelu.pdfIn PDF document text
    • https://cdn.sqhk.co/valujoper/jYhgRji/warzone_player_count_june_2020.pdfIn PDF document text
    • http://rinusiwujegabu.medianewsonline.com/vuluzeloforo.pdfIn PDF document text
    • http://zevibeponakat.getenjoyment.net/jadupavorenesinubotevebur.pdfIn PDF document text
    • http://fisuruwibowin.66ghz.com/additional_insured_form_cg_2011.pdfIn PDF document text
    • https://cdn.sqhk.co/nokowifupe/Le4OibT/red_sun_rising_band.pdfIn PDF document text
    • https://cdn.sqhk.co/sovajepuxe/fjgLFFp/go_stream_facebook_live.pdfIn PDF document text
    • http://lijamerogavex.iblogger.org/84732516577.pdfIn PDF document text
    • http://imgfil.com/170gv2In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/08af8b25-4445-46c3-a653-36997244cfcd/intermatic_timer_instructions_et90000.pdfIn PDF document text
    • http://wedutatitupaze.epizy.com/baba_farid_university_admit_card_2018.pdfIn PDF document text
    • http://xojurasonalefan.rf.gd/31348701514.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/8890506177.pdfIn PDF document text
    • https://e5447efa-8854-4d04-834e-f0bbd7438c8b.filesusr.com/ugd/ac612b_759bb95bb8c94b72bb4d6845fdc46761.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fekife/english_language_conventions_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/5584799551.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19fad478-7e2c-4726-804b-191b776b7015/rod_stewart_the_great_american_songbook_volume_iv.pdfIn PDF document text
    • https://ebd73b9a-b255-48a5-b781-2bd84b483b4c.filesusr.com/ugd/956c05_84f08d4d69684eb3bf987a0720d051c4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/94cbcbc7-2fab-4043-a52a-fcc085fc2377/bazusawaxol.pdfIn PDF document text
    • https://b03e51a8-7171-48c0-94d6-e4c032e6f37f.filesusr.com/ugd/9421c8_5fbd2b26f28b41e580bc8ed6557c1261.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/db0c72b9-1163-4177-8209-0997ce6b13b6/whats_the_healthiest_thing_at_taco_bell.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/501354fc-fb2f-4734-8532-8a2cc47c634d/30686897076.pdfIn PDF document text
    • http://sekizipax.rf.gd/krezip_sweet_goodbyes_sheet_music_piano.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F4 5560 bytes
SHA-256: f013888d2a9f3ed2caa185accfa6bcd5538f1be1574389430daae765734c0865
font_01_sfnt_off000107ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107EA 11332 bytes
SHA-256: 35d91dd627353ca5a9a2d4305bc52260982f5f44fb53193c86fed58a8f59cf72
font_02_sfnt_off00012e86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E86 16248 bytes
SHA-256: cbedb3f1c138cbd1ed142b21f340a5131a80a3b88a3ecc499d4b3da0f4805203