Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ab8dd2b9dacf4cd…

MALICIOUS

PDF

91.9 KB Created: 2021-06-27 17:59:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7e2198954b36bf5efdfee8379256518e SHA-1: 083de8363e8b630b8abbc3abfe7e1ebcb24dd726 SHA-256: 2ab8dd2b9dacf4cd28a99039d696961583b48dfeb31d08e7dd9511166cd39453
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It functions as a link farm, containing numerous URLs that point to compromised WordPress upload directories, suggesting an attempt to lure users to malicious sites. The document body was unreadable, but the heuristic firings strongly indicate a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a0297b43fa7---gozulexawovadonuv.pdf
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc5cc35e2bb---20058855197.pdf
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160c5e35748d6d---78341793340.pdf
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160775a8ff195a---vobegusidikumebetu.pdf
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607cee2daebc7---99696098116.pdf
    • https://ahha.az/userfiles/file/rikerisazedirajugiwig.pdf
    • https://caribemed.com/userfiles/file/xunoxudokafadojadu.pdf
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acc92c7d5f5---53478395173.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/190783b1341da9dd9b92c778b26eaa4c/31741706908.pdf
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/aa964e194bfbcec0badec51a8b9f611d/59863176029.pdf
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160842e98274c0---74500402805.pdf
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074a57f3c005---57276533044.pdf
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/d1da335aff1ff945752f1631b826ecd2/bozizepikokes.pdf
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/pm5cuokt02l487ijrufa3iqas6/23519145285.pdf
    • https://accesoriosalmayor.com/images/userfiles/file/duwenuxulivuvodibiruzid.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608e862632c8a---nuzesumizipafapikomub.pdf
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/9dd5658de6f4d10e33df47c94339de1a/semuzomakipub.pdf
    • http://hzbmsj.net/images/upload/File/48568656961.pdf
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/9e2eb4cefcc0c21eb5684654bd7b642f/lunifapuwixedetakowejuw.pdf
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/45681751b53ea95ea2c072836dbabcc3/gotozusamukeviwidu.pdf
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160779aee0ce89---40516954774.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=how+to+get+hercule+badge+legendary+xenoverse+2
    • 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_off0001003b.bin
d5effb43adfc2d8d089a6b5796f187fc5a67a438c6687e9ba06fa68c29250836		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1003B 11276 bytes
font_01_sfnt_off00011a9c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A9C 16792 bytes
font_02_sfnt_off000132ae.bin
ada759c53774b83fb020e91a91decf46358a8329fcc49bba4dc6823ac8d56ef7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x132AE 17964 bytes

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