Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f29fc899058578c…

MALICIOUS

PDF

85.5 KB Created: 2021-07-03 05:49:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 01b2317d6d45b236db591ff8d9cade9f SHA-1: 0087962e086cace09d222ce93514f094a610d38b SHA-256: 9f29fc899058578c4de913c2f8df973fbb1f159c988dd369c1946e46199d7b98
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, a common technique for distributing malicious content or phishing lures. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were directly extracted, the structure and URL patterns suggest it's designed to redirect users to harmful destinations.

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 https://dixietemporarystorage.com/wp-content/plugins/super-forms/uploads/php/files/604a69ee19dd83cfff9e965be82688c8/nekomovatiderefakozun.pdf
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/khjfsg38e544vuine41l5dra0b/50671907404.pdf
    • http://emotionpicturesfestival.gr/userfiles/file/37015677514.pdf
    • http://drapikowski.pl/uploaded/fck_files/file/mupumibevipopafup.pdf
    • https://luminex.pl/upload/file/8577491004.pdf
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b889f6f2796---tunin.pdf
    • http://petrduchek.com/files/64458060262.pdf
    • http://k-souz.com/userfiles/file/10611496232.pdf
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a578be5ed7---xukotudelakilopiriw.pdf
    • https://daiichitravel.com/uploads/news_file/46038193714.pdf
    • https://aspaeng.com/files/image/files/gowomemik.pdf
    • http://kco.su/userfiles/file/39887453000.pdf
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607573dd58aee---linojagetopegolijesanu.pdf
    • http://jhdjt.com/images/upload/File/wawefekokoxitudade.pdf
    • http://hurtglass.pl/upload/file/95303715407.pdf
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/8d6ae930bc223acc7ee02ec581e354da/fevowamamupajudaduneginaz.pdf
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608066074457a---kulivafixotawigodij.pdf
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b32b947ec0---47264955256.pdf
    • http://groupkaishan.com/d/files/molerununaxijofetiv.pdf
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073379760e25---62997155880.pdf
    • http://www.ecvbrass.ch/user/web/file/radolerubasijuwusiwe.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=3d+visualization+companies
    • 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_off0000ea6d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA6D 16792 bytes
font_01_sfnt_off00010284.bin
ac473f0a407063c9558434a9d125708c4c6f0651f9aa8b8b2839dec5be397a78
pdf-font-stream PDF embedded font (sfnt) at offset 0x10284 10876 bytes
font_02_sfnt_off00011bb4.bin
e8827acf3b7339131c7e3adfa24c50395a27c44983ebbdc263c16989e18a3039
pdf-font-stream PDF embedded font (sfnt) at offset 0x11BB4 17284 bytes