Malicious PDF — malware analysis report

Static analysis result for SHA-256 a657faded0cd9aa4…

MALICIOUS

PDF

62.5 KB Created: 2021-03-06 14:27:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: e4b9cf0fe0657d455580d0cc73d1467a SHA-1: 60b3398ee24e3ff0e7cf99a6844637b4b0a34cae SHA-256: a657faded0cd9aa4570c4a88a02a407e3d362b254f6e81ec27904b520dec9d0b
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many of which point to known malicious redirectors or disposable hosting. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the ML classifier strongly indicate malicious intent. The document body, though heavily obfuscated, contains text related to 'tacky the penguin stem activity', likely a lure to disguise the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6276

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=tacky+the+penguin+stem+activity In PDF document text
    • https://zotujoku.weebly.com/uploads/1/3/5/3/135304148/fitofazedobaremar.pdfIn PDF document text
    • http://jaxagogilexet.sportsontheweb.net/berenberg_capital_markets_analyst_salary.pdfIn PDF document text
    • http://xejopegig.mypressonline.com/24525050910.pdfIn PDF document text
    • http://invitesistem.ru/jiroruwimy05c8.pdfIn PDF document text
    • https://cdn.sqhk.co/pesenexur/bSEhhxD/mod_menu_among_us_pc_descargar.pdfIn PDF document text
    • http://itawegan.space/37152246686pn5t7.pdfIn PDF document text
    • https://cdn.sqhk.co/fagisuxupinu/iicheid/sloth_bear_habitat.pdfIn PDF document text
    • http://spain50off.info/tutorialspoint_json_editorszq82.pdfIn PDF document text
    • https://fosuwelu.weebly.com/uploads/1/3/2/6/132695698/7409975.pdfIn PDF document text
    • https://lalinixew.weebly.com/uploads/1/3/4/2/134265361/nipizaxudatubig_livirugekaxet_jesakodu_bufewunug.pdfIn PDF document text
    • http://rexevivejegox.scienceontheweb.net/48266687609.pdfIn PDF document text
    • https://sapigufebo.weebly.com/uploads/1/3/4/5/134592603/9058010.pdfIn PDF document text
    • https://muzuxagofonokow.weebly.com/uploads/1/3/1/4/131406885/nulozope_genatamasusopo_xatexutokeg.pdfIn PDF document text
    • https://duxegebipuvakij.weebly.com/uploads/1/3/4/0/134095857/a5bb00f36c.pdfIn PDF document text
    • http://vajesafosedepur.mywebcommunity.org/divine_intimacy_calendar.pdfIn PDF document text
    • http://rafupofamurawaf.mygamesonline.org/36846346201.pdfIn PDF document text
    • http://justiciaforjustice.com/14265386649x2ayl.pdfIn PDF document text
    • https://xufiridib.weebly.com/uploads/1/3/5/3/135346556/2512537.pdfIn PDF document text
    • https://cdn.sqhk.co/bosamame/hgf9ogA/league_of_champions_soccer_2020.pdfIn PDF document text
    • http://tivakifuzir.atwebpages.com/wagner_spray_paint_gun_reviews.pdfIn PDF document text
    • http://guwaxilajoxeza.onlinewebshop.net/how_to_apply_for_options_trading_on_fidelity.pdfIn PDF document text

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