Malicious PDF — malware analysis report

Static analysis result for SHA-256 705fe80443fe1e07…

MALICIOUS

PDF

82.7 KB Created: 2021-06-30 23:43:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: dcd6a0688188d6adff28a9b7dea3e79e SHA-1: 480b6966f05d4273919e64172fc697790509f7e5 SHA-256: 705fe80443fe1e07161522dede92a1c21b5786acde60f5c4a71707ac8c7fb06f
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV. It functions as a link farm, containing numerous URLs pointing to potentially compromised WordPress sites. The primary purpose appears to be redirecting users to malicious content, likely for phishing or malware distribution, leveraging a common tactic of exploiting vulnerable CMS plugins.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9931

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://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a24a4d21f3b---97443284858.pdf In PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609b6bb0e1779---xomewolexizezagiduluroder.pdfIn PDF document text
    • http://poorclarescork.ie/images/felutimugobevokevo.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160d9c71ccd0a5---99089331968.pdfIn PDF document text
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/5eab1e4384d1bbac42206b0e2544a177/lesijewetopum.pdfIn PDF document text
    • https://nikken-engineer.jp/export/sd205/www/jp/r/e/gmoserver/8/6/sd0748886/nikken-engineer.jp/fckeditor/upload/file/tipuzuverabedenuzuwadiko.pdfIn PDF document text
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/5a894b8131f7d7fe2bc9d803a85bcb28/2867516550.pdfIn PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/14b7fda01d8abc494d1dd07a2e1e3aad/gujemomaz.pdfIn PDF document text
    • http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1607158f7dd3ef---dupinarexojanevobe.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b590c72d3d---buluganetozofufop.pdfIn PDF document text
    • http://emannsltd.com/userfiles/losikatigalikup.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160868da673409---87676309696.pdfIn PDF document text
    • https://alzubidi.com/userfiles/files/sulapit.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/32565406299.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0fc4a3716f---fizasopepo.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/92092036beafa7f7d07b4618aff7ed24/wepipamudawu.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160af5baa4c8bc---95657669193.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160802e32e5ac3---45984633439.pdfIn PDF document text
    • http://atmaircenter.com/lb/userfiles/files/69470873204.pdfIn PDF document text
    • https://www.carrentchiengmai.com/files/vubijofuxezonatiwelu.pdfIn PDF document text
    • http://luxcottage.ru/stroykamen/userfiles/file/vifuza.pdfIn PDF document text
    • http://aj-logistics.com/stock/userfiles/file/20940983942.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/5dlh3rq7ep9p3pa43vqobb0c9m/79517049361.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=sigala+the+vampsPDF 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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB22 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e333.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE333 16228 bytes
SHA-256: 11c5a07d087146020572b41e3c25cf6f3fd7b709257038c787216a38c3b0495f
font_02_sfnt_off0000f916.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF916 16980 bytes
SHA-256: d6640de1eab725cd9a3f8fa59bca2474b09e70d0a357ea83f832efe4e2c506d3
font_03_sfnt_off0001259b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1259B 10516 bytes
SHA-256: b0f83f31d6603f5aa0f3194e1cdb9eed345dc6cc9007cbac3bfc9e7d0fbccd39

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