Malicious PDF — malware analysis report

Static analysis result for SHA-256 7db14c63fcd94688…

MALICIOUS

PDF

75.4 KB Created: 2021-04-17 14:56:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b6f2ddd9e6ba2aea1981ffa80eed9af SHA-1: 0d361480fc57ab6bdfd8a55f6df3a16810741c95 SHA-256: 7db14c63fcd94688177950fcc5742332352bb0c50f52c600b072c0a575621f54
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of an advance-fee scam. It contains multiple embedded URLs, including one pointing to 'zajinet.ru' which appears to be a lure for a movie, and another to 'buyfastedcircle.xyz' which is part of a link farm. The document's structure and embedded links suggest it is designed to trick users into visiting malicious sites, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://zajinet.ru/strik?utm_term=the+heirs+2+full+movie
    • http://buyfastedcircle.xyz/gabriels_oboe_guitaro2d6x.pdf
    • https://cdn-cms.f-static.net/uploads/4367646/normal_5fd5f43d3e358.pdf
    • http://svoylend.xyz/spreadsheet_shape_in_visioc8pey.pdf
    • https://cdn.sqhk.co/vasozaponem/dzNjgcK/summoners_war_mid_game_guide_2018.pdf
    • https://cdn.sqhk.co/kajipazuto/higcrVF/mebevajusetenorujewat.pdf
    • https://static.s123-cdn-static.com/uploads/4385009/normal_5ffde01b42ca3.pdf
    • http://wordsidepost.top/19760023139o7ich.pdf
    • http://bossyonlinex.com/ebook_muqaddimah_ibnu_khaldunimsfr.pdf
    • http://insta-sale.site/des_sketches__lire_et__jouer_gratuudsla.pdf
    • http://itrom.fun/varonozegodenaxibu72qr0.pdf
    • https://cdn-cms.f-static.net/uploads/4464301/normal_6010c5ae0904c.pdf
    • https://cdn-cms.f-static.net/uploads/4416656/normal_6066cc01a0fd9.pdf
    • http://oneitstore.pro/what_is_a_scientific_paper_format8gdmj.pdf
    • https://cdn.sqhk.co/wumerelup/gfjgiee/13565153549.pdf
    • http://biworigi.22web.org/algebra_1_placement_test.pdf
    • http://klyshsheff.xyz/scat_test_sample_questions_2nd_grade5j6xp.pdf
    • http://balifruit.com/487253697729zchu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://faberaladaruz.epizy.com/pediatric_empyema_guidelines.pdf
    • http://fopagozijudiri.epizy.com/employee_performance_appraisal_summary_sample.pdf
    • https://s3.amazonaws.com/sajatofubote/alive_lyrics_hillsong.pdf
    • https://s3.amazonaws.com/jefobexapulow/garmin_montana_650t_battery.pdf
    • https://s3.amazonaws.com/bufipevuril/riveted_sheet_metal_magnet_board.pdf
    • http://kiwimusef.epizy.com/nedopilenoz.pdf
    • http://gikukenal.rf.gd/82533684190.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e92d.bin
8f2648b35b3835395bc50dcbc2f77ede172242ebcd146168451c66df3e1cdfe6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE92D 4940 bytes
font_01_sfnt_off0000f9d8.bin
9f43dfcefb9af1965049df3c4370d6e459a2f0772d378e7d58658f494a2830c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D8 11348 bytes

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