Malicious PDF — malware analysis report

Static analysis result for SHA-256 df2462ff1707a0ce…

MALICIOUS

PDF

158.8 KB Created: 2021-06-26 06:23:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 68ce968d3da393d57954483feebb82c9 SHA-1: 3b51b840ac60fc9af564124fbc182a7fa9cabf47 SHA-256: df2462ff1707a0ce56f2216178a46604f249c9834c73d753d8a92b625e2e786d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains a link farm pointing to numerous websites, many of which are hosted on compromised WordPress installations or disposable domains. The primary purpose appears to be directing users to potentially malicious or phishing content through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9382

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://kystop.com/wp-content/plugins/super-forms/uploads/php/files/j5hi9a73m4m09fth8ujkj2e152/puvojijisujupumes.pdf
    • http://kraski-chernila.ru/resources/file/44728809022.pdf
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/hh2iq65c0ebjbje2cus33mrds1/dizem.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608b4827a7c77---tadipiramodirogare.pdf
    • http://vytvarnyobchod.cz/UserFiles/File/peparele.pdf
    • https://regiefranchet.fr/userfiles/files/dapaxakisibagid.pdf
    • http://chiron-ventures.com/chiron/home/img/upload/files/210621220855149698x9pa8.pdf
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/0vgu5mbdv51f8ju40u82nc55tt/xonogukaxilowep.pdf
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/6923c93c5fd4c504e37780905dbb4f75/99319980237.pdf
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160b24e776eb93---20438448494.pdf
    • https://rumahbaruku.com/contents//files/xadeg.pdf
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608164196ac2b---25685681998.pdf
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/7be6b9174e6b1d052e9e009c5d6488eb/rapuvejusakelasarikejit.pdf
    • http://bakoca.hu/files/file/65286498792.pdf
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/22d405994b0120cdb9ba2467b2f765d6/xinadosowisopukukixixigag.pdf
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160810edd0b55d---guzamanidinebeponefinusa.pdf
    • https://felix-schulze.biz/wp-content/plugins/super-forms/uploads/php/files/bh9jolbdrjtkd86os66n2fbg6r/kunofuguxutuxadijimene.pdf
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/dd957e043767d79e7505914ea3b9ac42/60065504672.pdf
    • https://clubforeducation.com/FCKeditor/userfiles/file/sexusegebasimilafijamiwek.pdf
    • https://fotoprint.lv/downloads/file/duvuzatokenup.pdf
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ca8d092cfe---24184890992.pdf
    • http://glotecgh.com/upload/editor/file/83164889210.pdf
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160caf8132b924---wizuxovisugilut.pdf
    • https://www.sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/16098306d74c6e---pimudaw.pdf
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/056592652fa0a8de89d034eb6d0e7554/tanenenifevuwib.pdf
    • https://unicornproduction.gr/wp-content/plugins/super-forms/uploads/php/files/ec7df0da9661d243ca0475c8886eb1b5/tafudesanivemog.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=flash+point+of+crude+oil+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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012677.bin
0f86a3e0365d0413e0015844219d807c92e3f97460c44ffa8d97373e1a4f51a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12677 10796 bytes
font_01_sfnt_off00013f3a.bin
8f275b620b375206240d0ffa563ec075961ec8628e99953bda931d700383719d
pdf-font-stream PDF embedded font (sfnt) at offset 0x13F3A 87564 bytes
font_02_sfnt_off00022549.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x22549 16792 bytes
font_03_sfnt_off00023d5b.bin
41b31737c491b0ba6c5125c7ae6e7a4a93bf1705955fc643008c86563c8f7c5e
pdf-font-stream PDF embedded font (sfnt) at offset 0x23D5B 17224 bytes