Malicious PDF — malware analysis report

Static analysis result for SHA-256 e15d1d0ce68cf986…

MALICIOUS

PDF

80.2 KB Created: 2021-09-21 01:51:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 48eebe29797a45644e3c3ec0477b4d23 SHA-1: cedcb9241d172d854d4af092514d8242235a45bf SHA-256: e15d1d0ce68cf986c8ae2e1767890e7846a3fe0174c58a597c93307c8bb79c72
204 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. The 'SE_CLICKFIX' heuristic indicates a social engineering attack that instructs the user to press Win+R or paste a command into a terminal, consistent with attempts to bypass macro restrictions. An embedded JavaScript stream was also detected, likely used to facilitate the execution of a secondary payload from one of the numerous external URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://hanilkwanla.com/uploads/files/lusizidumiwikoxoguzufud.pdf
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/c9d4a0dbaaa2731b1729834a7c9759d1/favinigujapavobabev.pdf
    • http://www.peritaonline.es/ckfinder/userfiles/files/fewipalanimoralugobabavi.pdf
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/64033a55d1c6fccc54a4ead3b41bdc92/26993487125.pdf
    • https://alcoolassistance-creuse.net/www/site/js/ckfinder/userfiles/files/sojanepomunegufilag.pdf
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136b79c10273---sanulemojipuj.pdf
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/2bb8b596e57fb36f0fa4019c1784ceb3/bozazelibupodefuboji.pdf
    • http://dagmar-e.de/userfiles/file/kenadasifomuxajop.pdf
    • http://artvideo74.ru/upfiles/files/49741230977.pdf
    • http://regmac.net/userfiles/files/wizenug.pdf
    • http://carrasvilla.es/uploads/files/25956375595.pdf
    • http://schroniskoorzechowce.pl/ckfinder/userfiles/files/jiduvo.pdf
    • http://newkontakt.ru/userfiles/images/file/19138542588.pdf
    • http://ecofincas.net/ckfinder/userfiles/files/bazaf.pdf
    • http://www.ktgroup.co.uk/ckfinder/userfiles/files/7121957315.pdf
    • http://ingmontagna.com/userfiles/files/gabijivonopawekukajivusu.pdf
    • http://apothepharma.com/upload/files/sifepaketibesajima.pdf
    • http://qhchemicalsfeed.com/upload/files/51719991088.pdf
    • http://vuatoyen.com/uploads/userfiles/file/wodinumizobatiro.pdf
    • http://xn--q20b13r9leepaeb.net/upload/file/202109090249004920.pdf
    • http://www.dawnrotaryclub.tw/UserFiles/files/40375237948.pdf
    • https://www.fyna.com.au/application/third_party/ckfinder/userfiles/files/petuzek.pdf
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614249a51377c---gevaziki.pdf
    • http://tecresconsolidamentorestauro.it/fck_data/file/68277838817.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=what+is+android+adb+driver
    • 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_off0000d621.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD621 16792 bytes
font_01_sfnt_off0000ee38.bin
e7fb1aa24ee6da652dd717048b205c54ceb2163a8ada9525a527c6c734c45a4a
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE38 10496 bytes
font_02_sfnt_off00010612.bin
cc5c1d2f279de707787b959b4d283ca5e57a1867c21388e24478d9dfd76156db
pdf-font-stream PDF embedded font (sfnt) at offset 0x10612 17384 bytes