Malicious PDF — malware analysis report

Static analysis result for SHA-256 8201d80bf738f7b8…

MALICIOUS

PDF

99.5 KB Created: 2021-07-21 19:42:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 96fc381cef33af72a91cbc1a8ea82612 SHA-1: c74f624f2eae4ce582ab2e200665b7675f83fd52 SHA-256: 8201d80bf738f7b8a484d55f6415b251015aabdf075e1fee18f16c8fbed9459d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress sites and disposable hosting domains. These links likely serve as a lure for phishing or to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16094d7806bb58---xiniwonuzoguwupujele.pdf
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a7473092553---luligorisosirexamep.pdf
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/sotahdm4vtme0lcqt17j1jt28l/87538765973.pdf
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607864c1d0e62---rulofofafijixe.pdf
    • https://kimtuong.vn/isc/public/files/fckupload/file/26554403178.pdf
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160ad0e9f3dcc7---vipakevalujebosaw.pdf
    • https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/cpuemerctf2ldo6l9f2plddmtp/basirupulin.pdf
    • http://minhphucvietnam.com/uploads/userfiles/file/repofipuru.pdf
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f58100e76---lemakunip.pdf
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/5904ca6fe8e14f2567a1847e278686b7/87384488883.pdf
    • http://elm3rad.com/file/tipexejomejegulob.pdf
    • https://cleaner.pl/userfiles/file/nujetipavijezixakosiwim.pdf
    • https://geneticapanama.com/userfiles/file/liwelojejajobil.pdf
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/16091b795e3eec---povubadinajavulese.pdf
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/kbaedk2idbu60l4hpvmgschfli/82375826904.pdf
    • http://c2r-auto.com/uploadfiles/file/2021071304532373499.pdf
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7e0437aebc---73097556935.pdf
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ae50556f8---24195544980.pdf
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b3baf3b9b4c---49285480303.pdf
    • https://alexandrapanayotou.com/web/images/static/file/miregutuju.pdf
    • http://mindatpeace.us/uploads/files/25721861911.pdf
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/bdfce405f3a9aa0dea62c9ae9de7001c/ronolijalubatokosabitowek.pdf
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/3d44c24aaa0d4e2ba001ae3bed1cc880/ribiz.pdf
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1607262a4de44c---sogoposumunuto.pdf
    • http://dush-kz.ru/uploads/fck/file/3006275811.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=shadowlands+frost+talents
    • 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_off00012104.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12104 16792 bytes
font_01_sfnt_off00013916.bin
1ff05d7979a7639bdce510fba9083c6254ce81634d5d10243f109c29389e8a40
pdf-font-stream PDF embedded font (sfnt) at offset 0x13916 18184 bytes
font_02_sfnt_off00016863.bin
3dcc8cbf98792ef0b1a5b20729de7627ca91872e3a9e4e1579b369fe29a7cd52
pdf-font-stream PDF embedded font (sfnt) at offset 0x16863 10520 bytes