Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e9a6817aac0c8d1…

MALICIOUS

PDF

88.6 KB Created: 2021-07-14 04:47:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: fe749db3e2263f1e6eeec9dcadc21da8 SHA-1: 8a904057217202fe981eec611158dba05111b3bd SHA-256: 0e9a6817aac0c8d1c6fd624ed5eb3bad573ab291862d9c36a359d0b6e716f80a
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 containing a link farm pointing to compromised WordPress upload storage. The ML classifier and ClamAV also identified it as malicious, specifically as a phishing trojan. The document's structure and embedded URLs suggest an attempt to redirect users to potentially malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160bfe8cc4880d---wodibujifadulokata.pdf In PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609b74caaad3d---pobizasipasugagurujubu.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/708e47243539ffe9973776ead6a5e9cd/68065442669.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/b6b2cecb3edbb2d369c1b809192f8f00/bemaxakudefitomes.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b0fe0f343c3---gipivosiwafemolibuxebado.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/bd2e8fa62ace090f00bf5b5c2ed04c6c/46867367788.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608387015d4c9---wufolesodigobokibobu.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/258f0f9f1493638bf436600c8fad439d/23984738182.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8a3d0e8171---lilewatuzuzibekumirakew.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210630225019158.pdfIn PDF document text
    • http://munsusa.org/userfiles/file/20210520030421.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/0d0a756fb4d0756a3211602f7352f3f1/sukagawipaloxizokibe.pdfIn PDF document text
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/e69921421c985e495acb847b2c760283/74654246104.pdfIn PDF document text
    • http://northstarbaptisttyler.com/clients/a/a4/a4b4c2e389351fb2dee96c3f727c6a57/File/62310136475.pdfIn PDF document text
    • http://skyfestival.kr/ckfinder/userfiles/files/fudegelokawe.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b1fb5b91743---69648570452.pdfIn PDF document text
    • http://morebricks.com/ckfinder/userfiles/files/vurosewab.pdfIn PDF document text
    • http://healthywithhart.com/res/file/34346969970.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160807aeecf65a---fupidaloki.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/e7089bca0ac0c315b377a87a0b76cbdb/jilapadit.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a940e20709---mupapejisufevijesex.pdfIn PDF document text
    • http://haumeaonline.com/userfiles/file/famidujasunufek.pdfIn PDF document text
    • https://acronimocostanzo.com/userfiles/file/38093454372.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=baby+friendly+vacationsPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f58c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF58C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010d9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D9E 17364 bytes
SHA-256: e673a974a987eba69007cd62c2d5ffdf9398706b32f51c2e743dc8d4d696d711
font_02_sfnt_off00013a8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A8F 10844 bytes
SHA-256: 0c0e9911cd21c1f4bf29fcc52cb7baecd0632464cbd7f46ab340732930e408b0

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