Malicious PDF — malware analysis report

Static analysis result for SHA-256 d312ad0831f63574…

MALICIOUS

PDF

86.8 KB Created: 2021-06-26 19:09:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 3474d238c5300978f367d964726a49b6 SHA-1: 598639e33bc5454faa7e386a5544ba26f91d142d SHA-256: d312ad0831f63574dd9036c62e44f2032083eddcc30141042b8f2c08188d9546
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised websites, likely intended to trick the user into downloading a password-protected archive. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' strongly suggests this intent. While no scripts were explicitly extracted, the presence of PDF links and the ML classifier's high confidence indicate a malicious document, likely a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://irlanc.ru/uplcv?utm_term=the+verb+to+be+in+english PDF link annotation
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/d610a0c1f6c07d3db4319ca08ad3c35b/zipotunexadeguzodev.pdfIn PDF document text
    • http://lycee-elm.org/userfiles/file/vowux.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/fc2b587c13c060740adb9b4b8f19e5b6/40969413505.pdfIn PDF document text
    • https://greenline.bg/userfiles/file/godaz.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae1f61a6ae---74333790778.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607b18358a04a---52886911791.pdfIn PDF document text
    • http://fogathajtohirek.hu/fckfiles/file/zajavaxinu.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a758b44bc54---sarozevego.pdfIn PDF document text
    • http://stasta.com/userfiles/file/49213163619.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609844929f528---direwuxapepogibezetili.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/82979aae294ee7d5a06865eb45e2fbf8/lopuninumufivitoxipesol.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/6880b7016605a6d62c158cc55efc3305/pivifimizemaxukesebixoku.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609983878177d---29947484447.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5fcc19ed36---rilejesabumusup.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/f4fd627fa135c723f7791658a1b98d36/85486439539.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/16074356bc4335---zonuvojiruxarudopew.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd6848cf2e0---71535397322.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/d4d77c3fc9813d30e08322b97c3626d5/fekuzi.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/gejch1u16rsgu1eelsuo2sesm7/tekusutugitinikizivifeped.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/76110d7f393fa0d27051d1d309a21fc8/31642011028.pdfIn PDF document text
    • http://spoanalyze.com/wp-content/plugins/super-forms/uploads/php/files/7be355e496f372bff974d1e20174d9b6/golas.pdfIn PDF document text
    • https://barcelonacentremedic.cat/files/galeria/files/nesupasifijusamomepot.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/53075c828492b871298aabb67ec08aaa/15009090978.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF8E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000107a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107A0 17872 bytes
SHA-256: 731eadbfa6064c1a8c6640ad5f3a5bcfbe72c763d0dc38cf5745790d2d32a263
font_02_sfnt_off00013681.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13681 10392 bytes
SHA-256: 08c99f45d67e247f5b2cecee2c2a9c582c7ec893d4ed219ca30b4786e7c19e3f

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