Malicious PDF — malware analysis report

Static analysis result for SHA-256 2296a95ac1c4a21f…

MALICIOUS

PDF

87.1 KB Created: 2021-08-03 01:29:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 5bea884ad7f057dc20054bdc7bba30ae SHA-1: 2cfad90fd082052a19702ce65bcd101ad5a5569e SHA-256: 2296a95ac1c4a21f6a0b902eb22b1265c30d6caa13be83128f5084ca17058621
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm, with many URLs pointing to compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9945

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 http://hurtmar.pl/Upload/file/bumituf.pdf In PDF document text
    • https://angkalaris.com/contents//files/52179549217.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a848b705885---12561136476.pdfIn PDF document text
    • http://chelseacarpet.com/ckfinder/userfiles/uploads/22095698058.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/a69cd1179ca8a3cb83cd4d3788c47599/fenukuzenoj.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073bbdfaba25---51657951703.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a40d53996f1---valewovafaranegibelukorak.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/6mm7qck0p7qptokhpi5q91iav1/nomif.pdfIn PDF document text
    • http://nature-revive.org/files/file/91129114215.pdfIn PDF document text
    • http://babyindex.nl/images/uploads/9080876428.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089e39e1c3a0---36738179972.pdfIn PDF document text
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/388d80a329da39c749b17c0085de54a9/tojuxarexeb.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16071f546787c2---65152735818.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd17e0b7e35---10285114139.pdfIn PDF document text
    • http://bagiez.de/userfiles/file/108406342.pdfIn PDF document text
    • http://orsolyajuhasz.com/ckfinder/userfiles/files/56878564310.pdfIn PDF document text
    • https://die-elke.de/cms/elke_page_files/file/setupojutaxotowo.pdfIn PDF document text
    • http://rybarict.cz/webpagebuilder/ckfinder/userfiles/files/negip.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070a3b7076c0---gebejomugasojesoranuporo.pdfIn PDF document text
    • http://secretlove.ch/ckfinder/userfiles/files/16691916608.pdfIn PDF document text
    • http://tahi.hu/ckfinder/userfiles/files/49058458384.pdfIn PDF document text
    • https://armagedonspedycja.pl/files/file/9509005080.pdfIn PDF document text
    • https://gadd-asso.org/userfiles/file/goxilasadugidit.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=srimad+bhagavad+gita+in+tamil+pdf+free+downloadPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9FB 16144 bytes
SHA-256: fcca37035df06e555c2991ff65faa0e8497ca6423bee408ebc46b3aef925b516
font_01_sfnt_off0000ef7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF7A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001078c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1078C 16816 bytes
SHA-256: 9adbcf1af8a7c5e6bb909634645d0b17154252a3283109403dc3b677e5cb8ce4
font_03_sfnt_off00013356.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13356 11144 bytes
SHA-256: 5e25b91babdbe78a75fbccc0f73403efb1347522b221b59eb766754394f2d95d

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