Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5d9c4e3210cc44e…

MALICIOUS

PDF

86.6 KB Created: 2021-06-27 22:25:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bc92bbac03ff51f95b70a981843038be SHA-1: a64070c01bd07cb0806760c6d2380e72a6255a1d SHA-256: d5d9c4e3210cc44e3d41595077ccb84c7ec5b5f79051e2039208fb55dc65c848
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, with numerous embedded URLs pointing to compromised CMS uploads and disposable hosting. This pattern is commonly used to distribute phishing content or malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://securityguardsupply.com/php/uploads/file/31543101407.pdf
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b81dd6f01c---90162337580.pdf
    • http://aylincinarli.com/fckfiles/file/gigodujunatimib.pdf
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/eeb54d8631cd87c9cb2e757f2890bacd/41913466075.pdf
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b323930122d---19904648860.pdf
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160885e6861045---bopeda.pdf
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608e13c850a3b---lonevolazazoxon.pdf
    • http://mhfmjournal.com/data/22/2/55/64/2544879/user/2788947/htdocs/userfiles/file/lovekagitoloradewotu.pdf
    • http://asesorgubernamental.com/images/file/88646338355.pdf
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608fd7b8cbc3c---modibetojet.pdf
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca0fbe4536---18261286711.pdf
    • https://biothiennam.com/media/ftp/file/notosigovubijexiwuv.pdf
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/rhk21mlq9fapi4621hbioqv8n9/51275495932.pdf
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1607a840b7af7d---57971656259.pdf
    • https://marblobaths.com/app/webroot/img/files/morojuli.pdf
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609b27c971264---xupilix.pdf
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a007d47ffa0---97766454649.pdf
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083bf80ef64f---68497225964.pdf
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/9d658c7726474802ce840c4d563d0f56/gojomajituxitilejabuves.pdf
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608c15a654809---gufajamizibatubaladapa.pdf
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b60497c4ba2---71056616323.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=god+of+war+2018+strategy+guide+pdf
    • 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_off0000eb1d.bin
660c0a80a2e79b950ef5071e284e8a44d5e754806cdc7a6e1cba30885d09248a
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB1D 17428 bytes
font_01_sfnt_off0001188e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1188E 16792 bytes
font_02_sfnt_off000130a5.bin
65fcf81eab2e4c872ac70df8e2ab15dc490632b3606db666cf54b027dccacd8a
pdf-font-stream PDF embedded font (sfnt) at offset 0x130A5 11364 bytes