Malicious PDF — malware analysis report

Static analysis result for SHA-256 07ad2786953b6cbd…

MALICIOUS

PDF

84.6 KB Created: 2021-06-27 02:29:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d5f592f2502af863e635f94d2ecb914e SHA-1: 88dcbea751610a3a815bdc5dd9fadaf597beafe4 SHA-256: 07ad2786953b6cbdbf1c60b0dc749495b5a45d2f787fec6c12a308c2d845f809
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608b37f232b45---84016472496.pdf
    • http://bannermaul.com/userData/board/file/bubobigivirip.pdf
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec33eccf16---dukusififeruv.pdf
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609abdce9f49b---namotozipot.pdf
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/f6cd454ab477a1f824d8092d055d1416/tolobok.pdf
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bc2fa5b7f71---32139863836.pdf
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/90c674cf1574130d678ea3d2f800abee/45937397891.pdf
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607909849fccb---sevudasisajamupo.pdf
    • http://grupposcorcia.it/userfiles/files/88790542566.pdf
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075acd994f4c---16645893903.pdf
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4eea5e18df---98193939844.pdf
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/5umu9o668h2ri6kkotd2k3iiku/boliwiwugageto.pdf
    • https://pypconsultores.mx/userfiles/file/kepelozujinawa.pdf
    • http://rgn2u.com/userfiles/files/welujurebixowonukidukeb.pdf
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/skgmkeeaokkchklnjf9qp95ino/74947589041.pdf
    • https://searchlink.org/userfiles//file/tigunifavox.pdf
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/5ug1a53727aifjpc7d5r4ld7q1/29192593863.pdf
    • http://poorclarescork.ie/images/18049513220.pdf
    • http://fcv-bo.org/data/fcv-bo/userfiles/file/34489131614.pdf
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/16086cb840870b---wonidesewawakenav.pdf
    • https://senhewood.com/d/files/biwedagafilotu.pdf
    • http://anhuifan.com/upload_fck/file/2021-5-17/20210517105206474931.pdf
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/8975cc95b79d00b21ec8edcb1b4c1f47/vilunoxilufav.pdf
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608abb7cc3bf1---6867095311.pdf
    • http://casinodanmarkjackpot.dk/userfiles/file/17904489982.pdf
    • http://the-bom.kr/upfile/files/19526062598.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=good+morning+dear+images
    • 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_off0000e927.bin
3f2c02c8ed1d8e5117f21febcc56f1b17123ea43acdee8c2e80eea04465f1b10
pdf-font-stream PDF embedded font (sfnt) at offset 0xE927 10484 bytes
font_01_sfnt_off000100b2.bin
f9cf02da73ce72f4cba87c95caf0a0c92629194129d8a736b88892d0962251e0
pdf-font-stream PDF embedded font (sfnt) at offset 0x100B2 17120 bytes
font_02_sfnt_off00012d43.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12D43 16792 bytes