Malicious PDF — malware analysis report

Static analysis result for SHA-256 93f338ce0308e005…

MALICIOUS

PDF

93.7 KB Created: 2021-08-12 21:54:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fbe7d5084a7547bc96571a3cbd7c84cc SHA-1: 58a19188ca2fcabba7dbe20752ca2e2f8019b6dc SHA-256: 93f338ce0308e0050be22a2cd992ddaea1aa8ee241c72252ad6caa69b4c81155
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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 http://palami.by/images/file/99023932222.pdf
    • https://adsbudget.net/userfiles/file/relazotifuleva.pdf
    • http://www.drivingschool-brno.cz/files/files/27887644964.pdf
    • http://usarsenal.it/userfiles/files/xunerevolodaxobis.pdf
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160f5b5608aec9---gutumurobadi.pdf
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/747889ba47f1c80349dd002e9f7a0201/4144231039.pdf
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/29ee62acf733f84adbbc805511a4928e/biwanavilenetalamesapikep.pdf
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/rhutnnn00ek9la2ok90gd9btp6/28927044088.pdf
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ffbdf30f2c3---19766353069.pdf
    • https://sieuviet.net/webroot/img/files/mewafu.pdf
    • http://dtcguild.org/clients/80367/File/rasiwufo.pdf
    • https://alshaabcoop.com/userfiles/file/pujof.pdf
    • https://medprobr.com.br/wp-content/plugins/super-forms/uploads/php/files/c239087782b65565d31f6b97cb529023/vavozinepuvakek.pdf
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/fb02d8cb396babbb1dd335451bff4639/dajexerivexepanap.pdf
    • http://sapientgenerator.ru/files/userfiles/files/44165065656.pdf
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607e202711cc5---5281106905.pdf
    • http://alpha-th.com/userfiles/file/66140754869.pdf
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/081d73acdf25a903c544e06138e42c14/31745630917.pdf
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/b327df4435bc20fcda27c0ef0e19b413/pelusowigipatupibixebizu.pdf
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/oaj97grhfpmvc60fle3uu2b3l2/votugesoguzinuku.pdf
    • http://canvangdientu.com/images/file/pawojitadupaxaxudo.pdf
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae65a9262e5---kemavud.pdf
    • http://biondiairsystem.it/userfiles/files/30017391181.pdf
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/d09a055c0bc514e9f588e9b44fbec68f/38269236752.pdf
    • http://architects-desk.com/uploadsfile/nuvukagon.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=vidmate+download+for+pc+install
    • 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_off0000f8df.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8DF 16792 bytes
font_01_sfnt_off000110f1.bin
1e33772c61bee30e86538fdc9771ed7340f2734aa26d7cd70dd33660fe16bc46
pdf-font-stream PDF embedded font (sfnt) at offset 0x110F1 29532 bytes
font_02_sfnt_off00014e68.bin
636ef6ad1e2c6a8baa4d95472cc9a46034d0e40e6f269fe7ca51b013a2e96c66
pdf-font-stream PDF embedded font (sfnt) at offset 0x14E68 10836 bytes