Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2412e26740326c2…

MALICIOUS

PDF

89.4 KB Created: 2021-07-17 07:55:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2ca6e30a07d06e17b33af59c721f93d9 SHA-1: 0c4e343b3d8f20af863c499cf90b622c01ceffc7 SHA-256: e2412e26740326c2c963d413ab169a5f7535cb443c364344c45182760337d214
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised WordPress sites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or SEO spam. No scripts were extracted, and the document body was unreadable, limiting the analysis of specific user-facing lures.

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 http://podiummoda.ru/userfiles/file/wozozifodofarerawazadu.pdf
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607faa24ba419---vegegojaxutamimamig.pdf
    • https://seeandhearbetter.ie/img/shop//contents/famurib.pdf
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e223ed14aa3---44519441131.pdf
    • http://alteredcompta.com/buddha/ckfinder/userfiles/files/74843994217.pdf
    • http://doktor-okonski.pl/uploadimg/file/videkogitifa.pdf
    • https://hospvetcentral.pt/site/upload/file/38439649946.pdf
    • http://kulturazebrak.cz/userfiles/kibeguwuwuwifo.pdf
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202105120315577462.pdf
    • http://angelojrobles.com/admin_initial_test/userfiles/file/87844054771.pdf
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/425e85044892a2768bb9d6b2cb4cda84/pukizososoge.pdf
    • http://tzoetemondje.be/uploads/files/33715854556.pdf
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/l7ualmmrrklvmfhgdrvmg9210k/87192120058.pdf
    • https://brawlcall.com/ckfinder/userfiles/files/91885036412.pdf
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c6dab02e4ed---51426205869.pdf
    • http://goodwill.pl/userfiles/file/jiviberironamufuzezado.pdf
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/s9ncd6s4huj2isq2ev1u2t10g7/puzuzebudapopixofegonaw.pdf
    • http://www.deco-interieure.com/userfiles/file/pofamivepis.pdf
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/6c498b2b627d526fc0a6269c4908cb6e/10319264450.pdf
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf08e33c2c7---43356702465.pdf
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad299782f25---xekup.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=motivational+appraisal+of+personal+potential
    • 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_off0000fa82.bin
b9602d09f01bc54e5b4f508412898217b633b7c1314d8f7508569c9cfd7647e4
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA82 10408 bytes
font_01_sfnt_off00011240.bin
4468858b66806dcd8ac7eba0db0e4e1876866713826e09dcc5276377c5e4a373
pdf-font-stream PDF embedded font (sfnt) at offset 0x11240 17580 bytes
font_02_sfnt_off00014054.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14054 16792 bytes