Malicious PDF — malware analysis report

Static analysis result for SHA-256 2be5c865775393a6…

MALICIOUS

PDF

88.2 KB Created: 2021-08-04 21:06:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e059b6a338531be8cf79fcf68b4b2f12 SHA-1: eef9df0487593b957ce723f0c3b37236b01319bc SHA-256: 2be5c865775393a644cb34dab6c301f11d102be65ff4ff31765039a12974da1b
156 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users. While no scripts were explicitly extracted, the nature of the links and the heuristic firings indicate a strong likelihood of malicious redirection or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://atpl.aero/ckfinder/userfiles/files/tadazilivuxuleg.pdf In PDF document text
    • http://colleges-in-tamilnadu.com/FCKeditor/userfiles/file/tudopilixevejij.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607c623ff21c5---sonisumifudapikevixini.pdfIn PDF document text
    • http://chhsclassof70.com/clients/1/1f/1f6d1b94cf555b90b9f410dfa82aea5f/File/wanerowozebaxukosu.pdfIn PDF document text
    • http://bacviettech.vn/userfiles/file/jitorenodup.pdfIn PDF document text
    • https://kurashi-kyoiku.com/cms/dat/upimg/file/pinumikuwukakobenejap.pdfIn PDF document text
    • http://boekenwinkelindex.nl/images/uploads/76617426378.pdfIn PDF document text
    • https://irastuff.com/admin/ckfinder/uploads/files/96481811252.pdfIn PDF document text
    • http://93564497.com/userfiles/vokobirerawarofuximagesi.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16106ace08349f---77761457042.pdfIn PDF document text
    • https://cualuoihoanmy.com/uploads/userfiles/file/83811458044.pdfIn PDF document text
    • https://musikkursus.dk/userfiles/file/wafavufirodaxuse.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160773861f326a---wegajok.pdfIn PDF document text
    • http://kco.su/userfiles/file/67173601440.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/16093cf31f2ff9---vedilebol.pdfIn PDF document text
    • http://e-park.es/img/uploads/files/wogugotosopekeguwato.pdfIn PDF document text
    • https://beauty-full.ru/uploads/files/95343189713.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a15d685206d---88496551582.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/80710570940.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/6c9021e3e8f180d2fedf63cf4479f13e/93284522962.pdfIn PDF document text
    • https://samngaimarble.com/html_upload/file/68894530422.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afc3dc2cbfa---tukazunavoten.pdfIn PDF document text
    • http://dongfangguohua.com/ckfinder/userfiles/files/dejabufawokubew.pdfIn PDF document text
    • https://windsbs.biz/files/file/tusoxowoxoremusimebizude.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=appcleaner+for+mac+os+x+10.5+8PDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f259.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF259 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010a70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A70 11116 bytes
SHA-256: 405ffcee180b238af9ee6479407a9ec71fd25b63319eb1e7dd2fe7c85f6850c4
font_02_sfnt_off00012482.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12482 17756 bytes
SHA-256: 1a0586ae08f844d661104fdb4e6e25539bce5bc0e63cc9db15114567d1b934d4

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