Malicious PDF — malware analysis report

Static analysis result for SHA-256 30d1b1a74b072b71…

MALICIOUS

PDF

72.6 KB Created: 2021-06-28 21:18:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a3c7536ce66b7830ba44a44d799fef3b SHA-1: 7b5573f504056cbfd787da24a58e1c9e96acb66e SHA-256: 30d1b1a74b072b71fb8e233c9f18ca8c0ca4b8741d412fc476fb026ede04ff85
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a phishing lure designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://amatnieks.com/pictures/image/fuvuwijaker.pdf
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a49dbde3b48---90062353165.pdf
    • https://foodvellythailand.com/upload/files/89911425812.pdf
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b920898f020---xazapevigixetegugekif.pdf
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/77c6ac3e1f479e094347798ae99c3e65/fetiwisufemonuze.pdf
    • http://snap-drone.com/userfiles/file/56783085237.pdf
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f217b55701---fujesulokitodivum.pdf
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/bq46ppe703o1gj8fdg14e76g71/7978973451.pdf
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/ad9d53603c486f0b06b928a03ea9f7de/25717387768.pdf
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1609ec7c871364---zilusodapobone.pdf
    • http://kulturazebrak.cz/userfiles/texajuzefi.pdf
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/4335007a7fa9c0677df316ff70c463e0/68014317416.pdf
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/8512aaccc5925502f2391ef1866fd518/wuwitunodifo.pdf
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/16073292c27824---28205787044.pdf
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b3d1cea832a---gepizawegeloxasor.pdf
    • http://askort.pl/Upload/file/71425964222.pdf
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e00368a17e---38303186518.pdf
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/527fb57c8f06fd0bb1961324651a99c9/kogolixugikaxakazenad.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=increment+in+r
    • 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_off0000bc1c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xBC1C 16792 bytes
font_01_sfnt_off0000d42e.bin
00c27c16ef76d166a595e626f6be6952b62ad355c34af0b6f48874ca2fa3571f
pdf-font-stream PDF embedded font (sfnt) at offset 0xD42E 16892 bytes
font_02_sfnt_off00010094.bin
f651b547fd692bbc64bf228e3f29b06b932d69650d254fbbeba702c4bcbc5707
pdf-font-stream PDF embedded font (sfnt) at offset 0x10094 9848 bytes