Malicious PDF — malware analysis report

Static analysis result for SHA-256 b68b8918ebe47595…

MALICIOUS

PDF

86.6 KB Created: 2021-07-02 11:10:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 22d04fce2215d82043a75f832aaace1f SHA-1: e8ebaf34cb01f92f756802082baf7df72a3401f5 SHA-256: b68b8918ebe475959a66f00abb61fd0a2e648004feae5715a037a76dbf78ba58
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites and are structured as a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of malicious redirection or content hosting.

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 http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16085536ba74dc---joruzulugi.pdf
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/17e769b94e85b26dfcb8e7fe44f89515/jamini.pdf
    • https://pet-fashion.ro/mm/file/29932105766.pdf
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607aeaa37aa1d---23660716009.pdf
    • http://lamorenj.com/userfiles/files/30219376139.pdf
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608531faba092---vosugikevojoxarusirer.pdf
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/3loiopljt7q20gmpeh78i0glgu/15398025912.pdf
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/33fa344726a395a3a457ac7b1a0f07d4/remegavugitugi.pdf
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb49bfacaa5---sivedujinukose.pdf
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607427030d440---19893005915.pdf
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/3dbcd55cf2e1bc0782bcede90780f028/23594262086.pdf
    • https://sasalidayanisma.org/uploads/file/38325249487.pdf
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/c0af3422ea7649511abcfe054e678705/80784157839.pdf
    • http://rld-carbon.ru/file/47664311212.pdf
    • https://censcakmu.org/board/file/files/xidiziw.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/3tbrcng1uhc6gips5perfbi8p1/gejuxuzag.pdf
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16094940e859b2---72125409213.pdf
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1f2de74fd8---87672928441.pdf
    • http://sentezetutmerkezi.com/upload/ckfinder/files/17426724507.pdf
    • https://hizlipin.com/calisma2/files/uploads/62087231531.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/21a2a00fd95fcabe2b99a2d853d81ed8/sikopamoxup.pdf
    • https://mimpiindah1.com/contents//files/81710485662.pdf
    • http://rayhovietnam.vn/upload/files/mupizaxagakevuxufatixinag.pdf
    • http://prochem.vn/images/uploads/files/91230660055.pdf
    • http://lordbeaverbrook1973.com/clients/76835/File/58412982902.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=feeling+and+emotions+worksheets+pdf
    • 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_off0000ecf0.bin
2b9e685a27097924603b0a6e871ae3ecc53f4dc4d15691436973dc37cf2e9fd0
pdf-font-stream PDF embedded font (sfnt) at offset 0xECF0 17052 bytes
font_01_sfnt_off0001198d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1198D 16792 bytes
font_02_sfnt_off000131a4.bin
472a4f5d7a64e319655efc9bd59e0d852565a474a1d663c10e334daf386bc296
pdf-font-stream PDF embedded font (sfnt) at offset 0x131A4 11100 bytes