Malicious PDF — malware analysis report

Static analysis result for SHA-256 207d478ad55bb0af…

MALICIOUS

PDF

74.3 KB Created: 2021-04-01 14:29:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ce6210163a7d8891d503423f773fe7b SHA-1: be651c8bf492001f3a811626d11bce8f6d8f962b SHA-256: 207d478ad55bb0af0b1202fd864f603c3d63f7e000aaf5afca3671874916e8ce
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs pointing to disposable domains, suggesting a link farm designed to obscure the true malicious destination. The document body, though truncated, includes a keyword related to a book download, which serves as a lure.

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://bologen.ru/wix?keyword=the+power+of+a+praying+wife+pdf+free+download
    • http://jajokojunewi.mypressonline.com/advantages_of_computerised_accounting_system.pdf
    • https://static.s123-cdn-static.com/uploads/4381083/normal_5fe23d62b7ae6.pdf
    • http://viziziziv.mywebcommunity.org/askep_angina_pektoris_tidak_stabil.pdf
    • http://vajokopopozikem.medianewsonline.com/tedipi.pdf
    • http://bozesedixek.mywebcommunity.org/jogokegewuveberetosonipo.pdf
    • http://granitmetrospecstroy.ru/pic_collage_frame_photo_collage_maker_pic_editor02rb7.pdf
    • http://mnogoturov.com/types_of_cables_in_networking7it15.pdf
    • http://lamanixumerad.mypressonline.com/vomonesitimax.pdf
    • https://static.s123-cdn-static.com/uploads/4501980/normal_5ff08950ec5a1.pdf
    • http://jalojewaga.mypressonline.com/57919684341.pdf
    • http://mekapidi.medianewsonline.com/5430276429.pdf
    • http://sujolisake.medianewsonline.com/2816932608.pdf
    • http://ridaxaki.mywebcommunity.org/carnot_engine_efficiency_problem.pdf
    • http://20970907.net/hunger_games_download_book_1nskkm.pdf
    • https://cdn-cms.f-static.net/uploads/4380854/normal_5fdc4fd819104.pdf
    • http://visunuduxat.mypressonline.com/digotujivolomodarerabo.pdf
    • http://vuwefedope.sportsontheweb.net/epson_wf_2630_not_working.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vawinujofupin.myartsonline.com/34506927985.pdf
    • http://fedonefekipide.myartsonline.com/adornment_theory_of_clothing.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_off0000e262.bin
9de617ebe6c6b06050eeb922f18ed911c6bb803fcfe2e2b2a701aba75251d826		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE262 5268 bytes
font_01_sfnt_off0000f463.bin
60553a4d059d7cfd7b7ad5d3102dd7b64292299eec0da052dd0e9c7cd63817d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF463 11360 bytes

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