Malicious PDF — malware analysis report

Static analysis result for SHA-256 e254ec9f1d9afd5e…

MALICIOUS

PDF

77.6 KB Created: 2021-09-03 18:03:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: ab594ee2e454184ec541be3de8af99fc SHA-1: 46f64eb517ebed851a86390d9f2ac78bb0278ff8 SHA-256: e254ec9f1d9afd5ef99110c068cc0bf84079c38d77a7f61cfc9f4eadb0da48f9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. The file contains numerous links pointing to compromised websites, suggesting it's part of a phishing or malware distribution campaign. The presence of link farms on disposable hosting and compromised CMS uploads further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc05d2a57b---pejebiseveraginonu.pdf In PDF document text
    • https://avonsteel.com/UserFiles/file/mejufedotuzuzewirufov.pdfIn PDF document text
    • http://pensionpoint.cz/userfiles/files/tefubuvorukavebiwivereduf.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606c93fd54e41---zatadivufufigo.pdfIn PDF document text
    • http://yourtruck.be/upload/ckeditor/file/dajur.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/205c4e28708e506804581f55e3fa5931/52692662360.pdfIn PDF document text
    • http://omeofest.eu/userfiles/files/daduz.pdfIn PDF document text
    • http://eastmoorclassof1970.com/clients/4/43/4343e427eb1b0a0668350338a4d6b623/File/95460380498.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9fa2d37f7---60374300360.pdfIn PDF document text
    • http://boursemoi.fr/userfiles/file/suliradanufefu.pdfIn PDF document text
    • http://jiangsutravel.kr/userfiles/files/20210814_123410.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/gjo82urd66vro2ssckhflmudci/23313859277.pdfIn PDF document text
    • http://hnc2.com/userfiles/file/13055014402.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fa103802d20---naxaduv.pdfIn PDF document text
    • https://vocembalo.ch/userfiles/file/3912701412.pdfIn PDF document text
    • https://plasy.com/uploads/file/jarejebezakiwut.pdfIn PDF document text
    • https://robert-zauer.cz/userfiles/file/piluwimowi.pdfIn PDF document text
    • http://gemwishrs.com/ckfinder/stones/files/mevoma.pdfIn PDF document text
    • https://haisanquangninh.org/data/dulieu/files/kiselugofoganosububumir.pdfIn PDF document text
    • http://marcth.pl/media/fck/file/zufozitoneludumu.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607736142c309---pejawafo.pdfIn PDF document text
    • http://lawyermo.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fopebebe.pdfIn PDF document text
    • http://albino-pitti.com/pub_img/file/78149838258.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=upsc+mi+ani+tumhi+ansar+shaikh+book+pdfPDF 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_off0000c56e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC56E 11044 bytes
SHA-256: 4e9b1bcc0927ffca2ac763d64cfce395ae7eb460d74f0be466e018f747604817
font_01_sfnt_off0000deb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB8 19060 bytes
SHA-256: 9a45d3b837d6d516d736cdfde1848ed2066e7b2e1a866875a7eb980f801532d9
font_02_sfnt_off00011035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11035 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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