Malicious PDF — malware analysis report

Static analysis result for SHA-256 c068b4a65bc9f2da…

MALICIOUS

PDF

79.2 KB Created: 2021-04-27 16:53:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d6d1b276055e93895b6c04f2971792f SHA-1: eeee735d6798a5e5199dbb660c25d3ca49a5930e SHA-256: c068b4a65bc9f2daa47d7f87c9b7361a732624de56d2ad8341988227942be601
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 threat. It contains numerous external URIs and is identified as a link farm hosted on disposable domains, suggesting an attempt to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics strongly suggest this document is designed to lead users to compromised or malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/strik?utm_term=what+is+the+best+sharp+microwave+to+buy
    • https://jusegopij.weebly.com/uploads/1/3/4/4/134480833/3001181.pdf
    • http://xegazinijitup.mywebcommunity.org/lamborghini_diablo_2019_preo.pdf
    • http://proba7.xyz/how_much_do_therapists_make_with_a_masters_degreemg11g.pdf
    • http://parhelifrl.space/15675592717qhoti.pdf
    • http://rankingcoach-seo.com/distribucion_normal_estandar_excel_ingles3jyso.pdf
    • https://cdn.sqhk.co/dejenuluzew/3jijfTq/78241277502.pdf
    • http://todayshop.website/angry_granny_run_game_download9g33d.pdf
    • http://dalifajebuxog.scienceontheweb.net/jigojomodolo.pdf
    • https://cdn.sqhk.co/sitopizol/jg3ggDc/molejukuvubevebunozetiki.pdf
    • http://jobauthor.online/destiny_butler_missingf07p7.pdf
    • https://static.s123-cdn-static.com/uploads/4459636/normal_5fdcee0ee576c.pdf
    • http://meetsucre.pro/solving_trigonometric_equations_worksheet_doc11l8m.pdf
    • https://static.s123-cdn-static.com/uploads/4406208/normal_5fcd36a0ac80b.pdf
    • https://cdn-cms.f-static.net/uploads/4367311/normal_601e977016acc.pdf
    • https://zefukigu.weebly.com/uploads/1/3/4/7/134718507/7595532.pdf
    • http://teagreen.space/567751071724eajq.pdf
    • http://reawont.online/vitafovetelewuzejgmuf2.pdf
    • https://kelobutino.weebly.com/uploads/1/3/0/9/130969458/80e8f75a2d58.pdf
    • http://pobunav.sportsontheweb.net/tiwubadavugonavojodena.pdf
    • http://varistop.site/fish_eating_other_fish_dreamtv5f3.pdf
    • https://jasebezaf.weebly.com/uploads/1/3/4/6/134630561/rokawa.pdf
    • https://cdn.sqhk.co/wepiwojeta/iDSWrYO/18306433913.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kepagewav.atwebpages.com/xomekewor.pdf
    • http://mifotabelimudon.myartsonline.com/gusano_barrenador_del_aguacate.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_off0000f7dd.bin
9f5d2b033a96fc4e8b20351eaefed8e821bdaaf860732d4231e912f1f092c40a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7DD 5548 bytes
font_01_sfnt_off00010aab.bin
c1b0ecc79eea6e79bf68b3d6903617627f79af69af17c441a6206c1a8e5e1be0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10AAB 10748 bytes

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