Malicious PDF — malware analysis report

Static analysis result for SHA-256 092f9633255f8eb0…

MALICIOUS

PDF

90.4 KB Created: 2021-06-30 09:08:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dee253f0180f17597f2250ab3fddb893 SHA-1: 92d413a98265abff2be1808bc71f7fac74380b11 SHA-256: 092f9633255f8eb0cb8c8d2ded43d3aaaac362c3ed5daa3633fa9c8a9e685426
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document functions as a link farm, directing users to multiple external websites hosted on compromised CMS uploads and disposable domains. The primary goal appears to be leading users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://tetraeng.it/userfiles/files/89694502254.pdf
    • http://winso.tw/userfiles/file/sixemodunenajebej.pdf
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b842a103f8c---11243487969.pdf
    • http://wisdomtours.net/upload/file/wusamadogaje.pdf
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/160bdd993008d4---dejejonex.pdf
    • http://seoulsquare.com/userfiles/file/51270719918.pdf
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd064e9bb8a---ninetunatajitotadeg.pdf
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce4ae54d9e---96125665804.pdf
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/1608be64c74678---42446667698.pdf
    • https://nnt52.ru/userfiles/file/80712169245.pdf
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/84e2ec68e770a275d6ae850538933c3b/29318824842.pdf
    • http://flatadministration.com/uploades/fckeditorfile/19027884217.pdf
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/792ade309e74a90035c1d2551c5e5f31/25774152027.pdf
    • http://nacyc.jp/Upload/file/39637676568.pdf
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a621cdc1790---9080844762.pdf
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607738cedfc08---pumulilevokozoni.pdf
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fbccba23df---4862333441.pdf
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/34f3ubusful66kchljcc2oeh8f/48495783646.pdf
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607895b5119ca---lotizagidetafukodaritun.pdf
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608f45dd98a72---sulerajefok.pdf
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/r6khpsn0v3sd61tt847n1a07b4/23429631212.pdf
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160983f624f49d---rolikonigipukamili.pdf
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/7e58d27d894bd61794e25584885ea699/ruriresugunomuxij.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=social+penetration+theory+breadth+and+depth
    • 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_off00010152.bin
f0256a27bbaff00a15f3fe343c5a303a0280fabb8dd5f7b6cb118e2e30171673
pdf-font-stream PDF embedded font (sfnt) at offset 0x10152 16544 bytes
font_01_sfnt_off00012bb7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12BB7 16792 bytes
font_02_sfnt_off000143ce.bin
d843eb543177042bf422c46f7b65d228cb9491b58f6e21b8637b06a36d9375a6
pdf-font-stream PDF embedded font (sfnt) at offset 0x143CE 10772 bytes