Malicious PDF — malware analysis report

Static analysis result for SHA-256 07f6f615bac6a58c…

MALICIOUS

PDF

86.0 KB Created: 2021-07-20 10:10:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1fb7907a66fe3583f2001242d6efa145 SHA-1: dde180c6f0bdd2b3fd4cc6c9e742d002821edd6c SHA-256: 07f6f615bac6a58c20826966461e43fd675c248b65c272e6d9a2d14ecd3b3e96
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous links, many pointing to compromised WordPress upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://alshaabcoop.com/userfiles/file/85730773125.pdf
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/70a604eae10a9e76a67888684ef1bf09/52185492666.pdf
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b32c2068481---gokomokivibujezemew.pdf
    • http://studiofapas.it/userfiles/files/garunedobemakezaditidawej.pdf
    • http://xn--42-6kcdlkbomh7beggito5p.xn--p1ai/userfiles/file/vajurogadewudobapetulebaf.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c40a796927b---pinowude.pdf
    • http://hillsdale66ersreunion.com/clients/c/c6/c679c52642bc64dd8629b98fb95ccc77/File/62769907980.pdf
    • https://kiaavcilar.com/upload/ckfinder/files/52110841101.pdf
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/3579591fa26d244530e00cd2c153c802/kaporarelepadixav.pdf
    • http://www.vandiestbrandstoffen.be/uploads/files/jixaselazikox.pdf
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/79faa1b1b5a4930f3da094e9e9b19ecf/ririp.pdf
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/0dc54307b7c9ca000204a5d382d4a32c/57155491627.pdf
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160716e2d0ae7e---wiligoziwedo.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16073f43feb516---banobegebevekoruboj.pdf
    • http://ridgefieldpark1967.com/clients/3/39/39eebdc8797e30ee23d4fd57d071fd44/File/melawupokawope.pdf
    • https://samavetpharm.com/userfiles/files/resozaxagimeto.pdf
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/acsc3b9ootcdpoc256isgeigc1/siwumezopujedarol.pdf
    • http://xn--e42bt3l.net/upfile/files/vufifurulewugenukixigerip.pdf
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/b5njk7fd317rlpeh7m9qcrd63s/kelejusi.pdf
    • https://datawire.gr/files/files/22332517700.pdf
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160a1b64b42dc1---warojemod.pdf
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/160bbffda49ada---tijurekixevirobep.pdf
    • http://chupanhnoithat.vn/upload/files/44901705010.pdf
    • http://stewartreunion2020.com/clients/2/2a/2a0d9dcdd57715375c9f4393c24df0f2/File/soluxinufikasaxezusi.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=for+to+us+a+child+is+born+bible+verse
    • 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_off0000ee42.bin
3483601b8251c8d04097ef0bcb7565a07888f3aa42b8b8fb0e70d1fdfa495672
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE42 16968 bytes
font_01_sfnt_off00011a08.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A08 16792 bytes
font_02_sfnt_off0001321f.bin
b9e41d9de99bdeefdf04997a63adf3167ca7a49880f9168fc0a95e0cd5552573
pdf-font-stream PDF embedded font (sfnt) at offset 0x1321F 10752 bytes