Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8e7d9a3eaea9014…

MALICIOUS

PDF

81.1 KB Created: 2021-07-06 02:48:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 60bde7f020b5de15654f62303c2fb6a0 SHA-1: a1417747cd397f54ee5f68cd3604a4d01ff2cc52 SHA-256: a8e7d9a3eaea9014194e8588c9476013a583c6d8b2d380597d56d696b753849e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to redirect users to malicious content, likely leveraging a PDF exploit or social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/43n8cr1mmqq0i8al9nife4sjp3/88527703235.pdf
    • http://madmojo.com/fckupload/file/60733409940.pdf
    • https://flardochform.se/userfiles/file/sidajenapaxobukara.pdf
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/74ac4f41ffc73398ad90e2e549404319/xulexixosinisuwubugemogod.pdf
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f2a5699ca---liruzorakufojogunox.pdf
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/e15589j8vl8346qbhpe17mo0rh/15690212866.pdf
    • https://bibliothequeanglaise.org/upload/files/rowadozas.pdf
    • https://charlesstreetvideo.com/userfiles/file/tideganixijuvukukifekapop.pdf
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160db0818b3b4c---ganadovusapake.pdf
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/49ejpns095n8gon9o5pk7u61gh/13264272747.pdf
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ec5512caf---5574185048.pdf
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160c43a5ac55c2---gazewunasulezasikokorug.pdf
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1608098e13d2dd---vuxiveluvotiberekumix.pdf
    • http://ndt-tl.ru/upload/file/vimegubagutemapemiwaso.pdf
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609eba46de8a7---levisewejedago.pdf
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be611e39ae4---27583237706.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c955e20e3de.pdf
    • http://lbhodgereunion.com/clients/3/38/38e1f81cb1ac74d12d86c8ba87866b9f/File/lonomajoferemifuwikemoda.pdf
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608037ef56a7a---rawen.pdf
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e1e0ce4a6d---nulamanotoruzemitekipexa.pdf
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f513217602---vidijagini.pdf
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609568fb3061f---xekojafivatebudanewekaw.pdf
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16080082039dfa---82051730105.pdf
    • http://splogservice.ru/content/file/92047873778.pdf
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfcba493065---xazimidebifovibefanusibix.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=8051+microcontroller+internals+instructions+programming+%26+interfacing+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_off0000d754.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD754 16792 bytes
font_01_sfnt_off0000ef66.bin
bf6a4ef1dc2ed8b405c0dcbe04d87373ac803f337c598df72db54850ee9b3521		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF66 16968 bytes
font_02_sfnt_off00011bfc.bin
aca2564562931fb6bd44aa36a3d40c52e7a4945af1c9014439a4e72be6a64c9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11BFC 11236 bytes

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