Malicious PDF — malware analysis report

Static analysis result for SHA-256 faf7a61e74057972…

MALICIOUS

PDF

86.9 KB Created: 2021-07-02 05:06:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ab58f1df3fa503f86d0515188cd35658 SHA-1: ce6f648253d71493c41621d191e7c098303d3fbf SHA-256: faf7a61e740579723fddb6d0795a1bab2f708e7d36031a0e7e841f4baadfe376
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 websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links. The document body is heavily obfuscated and unreadable, providing no direct clues to its purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://jamesirvinewedding.com/clients/f/f9/f947a18657f5d77a8fcd192ffd4ccf25/File/zegujemoxabuxe.pdf
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/3ee3e7b2291f56363d26bc3d0f14d832/migabisigewevowa.pdf
    • http://tvtamminhphat.com/uploads/userfiles/file/32013956578.pdf
    • http://adabaskimerkezi.com/upload/file/62828888639.pdf
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/16075caa8d38dc---fidapasu.pdf
    • http://patronusalapitvany.hu/public_html/upload/kimowib.pdf
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/daab6b9c296e4128d6242fcf5f2d66b5/rurukukapuvisinojo.pdf
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c851182e041---89721757050.pdf
    • http://gospel-pour-100-voix.com/fichiers/newsletter/file/4594147196.pdf
    • http://helloslow.com/data/userfiles/files/43691717281.pdf
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c91752c5e07---67780773971.pdf
    • http://shelton1961.com/clients/35589/File/74466269501.pdf
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/656c87847002178fe5d873e72009d1c9/vuwuxevowopalozeto.pdf
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d54aa33201---kogago.pdf
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16079c2d8af784---72292426381.pdf
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a679e442b9f---13663349560.pdf
    • https://guruamardaspublicschool.com/userfiles/files/2955354175.pdf
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fdeca5828e---kimotokisefozojumotoletun.pdf
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/quoctrpb0a5ki3i61fdvoqr9h0/70972143780.pdf
    • http://nomorecpapmachine.com/userfiles/files/80256135625.pdf
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080a6f8903a3---waroxowitow.pdf
    • https://aucordechasse.fr/vosImages/kulub.pdf
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/6n4g91k6ndfnct6umcnsbos1j2/leboganurusuluwisiju.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=8+ball+pool+free+coins+and+cash+generator
    • 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_off0000ef9c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF9C 16792 bytes
font_01_sfnt_off000107ae.bin
f5f98ca8b57876bccb24eedcf9e082046e803d37d82fda6c91590f562564fec3
pdf-font-stream PDF embedded font (sfnt) at offset 0x107AE 17288 bytes
font_02_sfnt_off000134b7.bin
6f6ad860ebe4204fceb5dfd6552effb6c37af450cdaa623d42f3992b6b41978c
pdf-font-stream PDF embedded font (sfnt) at offset 0x134B7 11148 bytes