Malicious PDF — malware analysis report

Static analysis result for SHA-256 19eb4fe0a3934093…

MALICIOUS

PDF

93.5 KB Created: 2021-07-08 06:11:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0f472c8748daf53bca357a486791831e SHA-1: e0e1780ae843296bbcda5888dce50e389aaed250 SHA-256: 19eb4fe0a393409342ac7037c173c95bc0b8788467e57a35a0fe12cf59436538
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites, which are likely used to host phishing pages or distribute further malware. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/ce2726721bb353645c8fb3e92733711e/gabevagedamitojev.pdf
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/07f2c28183120341b2a70f95f6ac4e26/4242886705.pdf
    • https://kudamatsu.org/userfiles/file/mozuzopase.pdf
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/38b5b6f33fa7b1ce9fdb3e75543f80ea/boganina.pdf
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/625a803139ee18b0f558006e7cfd12f6/nupakerobetoka.pdf
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160ae050cb1a93---nojijalugidopegot.pdf
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/g128ivec1mamgc56hll33ohvoa/98843324673.pdf
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094b21ab57aa---60246146882.pdf
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/odk9cvt9qe9184l4ascjv9oi57/52833713697.pdf
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/22829400c255bb00c6548710973621c6/33653585290.pdf
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/21c84900bfe69b71f224dcd88df6dd5c/merikisogogisilebopa.pdf
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094c6c6e2b78---zaruvawaje.pdf
    • http://asesorgubernamental.com/images/file/21454782940.pdf
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609b20d7b3258---lupajobinafan.pdf
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b239c5e5451---tamelurezerisonudik.pdf
    • http://olsztyntransportmedyczny.pl/userfiles/file/demomadokapewanasejofemud.pdf
    • http://odpadykj.cz/UserFiles/File/64228616454.pdf
    • http://chiengthai.com/file_media/file_image/file/28455332260.pdf
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/uprh75duj9iv3lfc2mo4582ks2/nibefubegudorolem.pdf
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160abfd8c49ed2---80497439041.pdf
    • http://quaker1960.com/clients/3/34/346d0055920ff30d27c63167e405b0e7/File/51983614562.pdf
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160922291cce85---3186642582.pdf
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a36b27d355---nomotezifoliluxutewoz.pdf
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/86e896d1e709afbfccbcec7e87c84635/31963586340.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=superman+call+to+action+sideshow
    • 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_off00010761.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10761 16792 bytes
font_01_sfnt_off00011f73.bin
581e7136988771164698e4ff5f37fbd46293059171011dcd6e869c3141ee80a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F73 17632 bytes
font_02_sfnt_off00014dc9.bin
741ae9d7775edbc76ab6fb33cbe42a6fbf0ff80d77d96d17692c2131cc1afe64		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14DC9 11040 bytes

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