Malicious PDF — malware analysis report

Static analysis result for SHA-256 c267ca04c0b1c72a…

MALICIOUS

PDF

95.5 KB Created: 2021-09-07 19:07:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: fe9b81a25d015f534aa7463db81882ff SHA-1: ce3abe4609ac893a4daa7e186bd1087a3982902e SHA-256: c267ca04c0b1c72a6e590f86fd937da4981e86a93211845cfb9118952831313d
156 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised CMS uploads and disposable hosting, suggesting a link farm designed to redirect users. The primary purpose appears to be directing users to malicious external sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://p-energo.ru/content/file/59039421896.pdf In PDF document text
    • http://raegcafe.com/uploads/files/fuloxo.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1606d366e690a9---11553434719.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/dpf1k3fi02lm8qjo69gaj6lu36/27267155999.pdfIn PDF document text
    • http://traiteur-ribot.fr/userfiles/file/gidurepolepawuke.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/majatamak.pdfIn PDF document text
    • http://w-f-l.de/user_img/file/nagarepuxawuselusafil.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/160849226d11a7---3420416127.pdfIn PDF document text
    • http://balcimimarlik.com/resimler/files/vuxitowotogewixud.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/a26471b33124443e5674bf816d19f5fb/98956609749.pdfIn PDF document text
    • http://austria-ex.com/images/blog/file/siwuvolafomegitadijolexo.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b55c7bbb60d---sopoja.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/d68b1878f2427d87df1d82a42cd7b41c/rewafogamigum.pdfIn PDF document text
    • https://dakotaterritorydevelopment.com/ckfinder/userfiles/files/20065282815.pdfIn PDF document text
    • http://studionegro.net/userfiles/files/63266933529.pdfIn PDF document text
    • https://ndmoyun.com/calisma2/files/uploads/zexodeseg.pdfIn PDF document text
    • https://bestofbucerias.com/upload/file/23044955706.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/fa720b745d951cde68dd2c8d221a8973/xejonovadenebekal.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3a970bfeb---remofe.pdfIn PDF document text
    • http://animalscipublisher.com/files/upfiles/file/kedimejavoworelej.pdfIn PDF document text
    • http://ieeepes-thailand.org/app/webroot/files/files/52581883609.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6b1647b319---62847821529.pdfIn PDF document text
    • http://mnogonomerov.ru/uploads/file/44869139107.pdfIn PDF document text
    • http://halaljones.com/uploads/files/92546925176.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=antihistaminique+h1+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_off00010e85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E85 19204 bytes
SHA-256: 3eab1cfdc14bc3090fa1204276d7cfc09f7c57d8e3b6f2c41da378c99240d68e
font_01_sfnt_off00013fc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FC8 10776 bytes
SHA-256: c4d8b54ecde3381c68fa4ae6407bfc2ce488d42f7f415223f61a6d1634994ece
font_02_sfnt_off0001583c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1583C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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