Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1c738a316bc86d0…

MALICIOUS

PDF

73.2 KB Created: 2021-02-21 20:18:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: adc07c0fef1f30f162ed8ed1cef2d80b SHA-1: 027a185def97723f0ea918fa0e643ad6d54a41f8 SHA-256: d1c738a316bc86d03ffedc70ae1acc7e0d5c6112ef7fe074716e48d1b6951465
134 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged by ClamAV as Pdf.Phishing.Trojan. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure strongly suggest a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jacksth.ru/wb?keyword=sql%20queries%20tutorial%20pdf PDF link annotation
    • https://cdn.sqhk.co/gupuwiwi/djjf8ia/meteor_shower_michigan_september_2020.pdfIn PDF document text
    • http://creamwalls.online/wupopaxakododapawujof35ju8.pdfIn PDF document text
    • https://cdn.sqhk.co/dofewijoras/igfZggh/mobile_gamepad_controller_gaming_keyboard_mouse.pdfIn PDF document text
    • http://idealica-itufficiale.website/karuvenulazepujqvgbw.pdfIn PDF document text
    • https://cdn.sqhk.co/gozafavapawu/gjohgAR/dr_driving_game_online_play_jio_phone.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368469/normal_6003642f53dbe.pdfIn PDF document text
    • http://lnstagramoriginal.com/572133124983se12.pdfIn PDF document text
    • https://cdn.sqhk.co/xovujiroveg/njdhaOP/dragon_city_menu_fulton_ny.pdfIn PDF document text
    • https://cdn.sqhk.co/pedidagow/ib3B4hd/i_wish_quotes_about_love_him.pdfIn PDF document text
    • http://kuzojud.66ghz.com/takeuchi_tb230_service_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/mogowepuw/izjQFc0/92220385112.pdfIn PDF document text
    • http://dehydratedoriginalgoodness.com/3268183420371ixm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kutegabirena.epizy.com/sports_illustrated_swim_cover_2020.pdfIn PDF document text
    • http://dajizipazubeva.epizy.com/career_goals_examples.pdfIn PDF document text
    • http://jusowegakero.epizy.com/33510167082.pdfIn PDF document text
    • http://giwalawap.epizy.com/authenticator_microsoft_apk.pdfIn PDF document text
    • http://vamivesuger.epizy.com/23289781303.pdfIn PDF document text
    • http://porumujowupof.epizy.com/r_bookdown_bibliography.pdfIn PDF document text
    • http://vejimugar.epizy.com/onedrive_android_sync_pictures.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE120 5264 bytes
SHA-256: 98ba0d70bcf9a0d3922261ea406bf2b00c5777e4073ba243a142f769cb6da15d
font_01_sfnt_off0000f314.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF314 10824 bytes
SHA-256: 2bf7a30ae2eeaf94dbac1a1547464cb2d04d31e12bcbb10916edb462e6d66bdb

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