Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d70f3d12c98699b…

MALICIOUS

PDF

79.5 KB Created: 2021-08-28 13:37:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: c2106dc76936afc3dce8710f75ad791e SHA-1: 9c5511cd84074f03fc60eb040f4656c4d000a8af SHA-256: 2d70f3d12c98699b2d9c1edc60eaa603da42a8dfa331553fe770d68474d508de
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm to distribute malicious content or conduct phishing. The presence of embedded URLs and the nature of the heuristics indicate a deliberate attempt to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://pixomot.ru/uplcv?utm_term=the+blood+of+jesus+as+a+weapon PDF link annotation
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160e8e8812711f---lavawukifikupijubuwase.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/d93e29636eceff1cea06934dd58917d7/botupulimakatud.pdfIn PDF document text
    • http://marty-triple-m.ch/inhalt/files/79123451269.pdfIn PDF document text
    • http://renknh.com/ckupload/files/tibotaxamumeteza.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/7be1aea66590aee173f06ff89cbc453c/kagogozoxiperenuduku.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083acbfba3f6---fusofifolimuvowulurupime.pdfIn PDF document text
    • http://woodbridgeabw.com/uploads/files/71102612365.pdfIn PDF document text
    • http://marasintl.com/public/ckfinderuploads/files/92015713333.pdfIn PDF document text
    • http://mocphatreal.com/assets/images/ckfinder/files/21524191325.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f6f585ea904---pudutovabawujilud.pdfIn PDF document text
    • http://walker-doss.com/clients/4/45/450b4a4af5ff3f13851793278d9c7ef8/File/305926900.pdfIn PDF document text
    • https://hamzakocakoglu.com/userfiles/file/69576971654.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/16082f21946a41---21133174742.pdfIn PDF document text
    • http://mtcnx.com/upload/fckimagesfile/fonisovovurixoriw.pdfIn PDF document text
    • http://vsrru.ru/userfiles/file/nixotepajaribexopeforanin.pdfIn PDF document text
    • http://dailynewsodia.com/assets/ckfinder/core/connector/php/uploads/files/faxugijowosomazokusolod.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160eca963bc889---wupegizidezo.pdfIn PDF document text
    • http://forter.vn/hinhanh/file/kabujuvidikusolorufowan.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/ligujomerabinuvasived.pdfIn PDF document text
    • http://ctkupavna.ru/upload/file/tilipojotosugajel.pdfIn PDF document text
    • http://www.bandungmesin.com/file/tumobaxedebifize.pdfIn PDF document text
    • https://greengenome.in/admin/userfiles/file/povesirutatebofi.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ddbe2df3b65---95306992549.pdfIn PDF document text
    • http://bhhangkhong.com/upload/images/files/37492740239.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160831c0b48629---27093361398.pdfIn PDF document text
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/58fab1696b5c2686dc48ce75d0791589/kekobiromugisonavid.pdfIn PDF document text
    • 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_off0000d255.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD255 10724 bytes
SHA-256: 0fd9f3de798164aa54ea8ed3e955497e2bdb9a13a19d5f44af58777bcacdf4c2
font_01_sfnt_off0000eac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC0 17192 bytes
SHA-256: e581434841c5683eb3b4aef9a1e81e1d63bafcfc1b164867493d36d3c60a97d7
font_02_sfnt_off000116ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116ED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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