Malicious PDF — malware analysis report

Static analysis result for SHA-256 07a8081ddd2a9d03…

MALICIOUS

PDF

83.2 KB Created: 2021-06-29 01:54:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d51b10891b3227faab963666f74c1fa1 SHA-1: f944b04464b471ec993d35bda30731afeed922e7 SHA-256: 07a8081ddd2a9d03beda9c69e4afc01527eb89c463f76b3a5df57bc0b3f29717
156 Risk Score

Malware Insights

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

The PDF file contains a link farm, with numerous URLs pointing to files hosted on compromised WordPress sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a non-clustered link farm on disposable hosting, suggesting an attempt to manipulate search engine results or distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c62327e76f4---rexaruredanugobijizan.pdf
    • https://allianztc.ro/files/file/11670385847.pdf
    • http://askort.pl/Upload/file/kazetusufetogubus.pdf
    • https://triangle-electronics.com/assets/userfiles/file/kuxokikasuxuwotokonefubod.pdf
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/md0s1h39s1cv6r5fe50fu74ea2/guwevab.pdf
    • http://elite-weekend.com/clients/9/94/945a7f92a07ecc721aac768ad340748a/File/97894514781.pdf
    • https://swagath.co/new/ckfinder/userfiles/files/lafoxatifizofif.pdf
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/blsku5pn66pa13g3jku70n0psn/95586031006.pdf
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/4b609b5bda41cbcad9e2faa116517516/39758870343.pdf
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/ov9ua104bpnqm228q39522crbv/zexudarobi.pdf
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4702a174b7---zeredowenokezov.pdf
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/dbhroj6l6nd7cqhllcg68hopu2/10221616320.pdf
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbe7a0c49c5---bakatujipodevaluxu.pdf
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160ad8c49049fd---64772461758.pdf
    • https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/299fc988871cf6c0f6dd826e087f6701/fabezegomekakexidulojuva.pdf
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608bc9038b067---8155823199.pdf
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077503c3e1fe---35019839605.pdf
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce027254da---sobefeperef.pdf
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/n4te0mmvsf5710jahbk0o1bfqv/vaxugovinewajopevag.pdf
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a57fd2a8817---gixizotapepojepalojujubex.pdf
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/m82ndlhb0ebkvtt13ni8svmnh0/wikedejalasedikegido.pdf
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be30ee2b010---nefodijomiramezi.pdf
    • https://bloomland.com/sites/bloomland.com/files/83102147274.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=definition+for+curt
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e22b.bin
6533902f9f8605dfc4eec04f9b58837e67a2a743093ee21548fb9fe7f62cc539		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE22B 18028 bytes
font_01_sfnt_off0001113d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1113D 16792 bytes
font_02_sfnt_off00012954.bin
2f3d820cb28f1de528dff51ecbd2735898beba5bc695dacd1ec7356ba95286bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12954 10056 bytes

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