Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b205ed52adac05a…

MALICIOUS

PDF

88.2 KB Created: 2021-07-17 07:16:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 9aa716968d0225b21fa359bc236e9b06 SHA-1: 0d64b3102a914c5024fcfe4c21fb15d610fc7c38 SHA-256: 4b205ed52adac05a5e97f60071fedd610c72ee2acffc4e2d296216a31ac0ad49
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. Heuristics indicate it functions as a link farm, directing users to multiple potentially compromised or disposable domains. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/b3242e411c3cd32079724f98867ecd2d/82695802614.pdf In PDF document text
    • http://goteneplast.se/files/images/file/38127865795.pdfIn PDF document text
    • https://2-view.org/home/view/public_html/ckfinder/userfiles/files/11359211848.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609adcdc0cf6b---sunefojute.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/vc3uno7g7bbhhgl34ijtqmr2k7/muvajakevazobikabova.pdfIn PDF document text
    • https://pelicanfinancialnetwork.net/ckfinder/userfiles/files/fegaf.pdfIn PDF document text
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/3b4a34fa79b516d19d0212a068823373/xodefiniba.pdfIn PDF document text
    • http://capitolmetrophysicaltherapy.com/userfiles/file/82439082323.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607950fcd3411---71567118432.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6cbbe2c70b---1441817319.pdfIn PDF document text
    • http://moestuinwebshop.nl/userfiles/file/komuponemiburoporisag.pdfIn PDF document text
    • http://bagliodeimille.it/userfiles/files/rutejedaxevezevidemo.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087bf891d35a---38331205543.pdfIn PDF document text
    • https://diphong.com/uploads/ninopabematiruwokitabuva.pdfIn PDF document text
    • http://yuha.be/_files/file/49853011560.pdfIn PDF document text
    • https://susta.vn/userfiles/file/rabogapilajuvijodegilofol.pdfIn PDF document text
    • https://blindnow.com/userfiles/file/rakifugisubebodewala.pdfIn PDF document text
    • https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/950e51a908d9edd4bf8c8c49ec6616f6/46647196740.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/t03npnfnginq7gmucp20coij64/49261380130.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076a1d022f21---31201517231.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/bcaeda694e038c28f502c33e37e058e6/xisiwokakovobunoret.pdfIn PDF document text
    • http://4grd.com/cmsimages/file/xefizuzaluzigavino.pdfIn PDF document text
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/o04a3epl9g849kqa5f2a3vt53b/wejuzezozigozutizekebe.pdfIn PDF document text
    • http://bakerfamreunion.com/clients/1/13/13be4b03bdabdd3a133c3ee64ed6201b/File/88828535469.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=how+to+bend+text+around+a+circle+in+photoshopPDF 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_off0000f399.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF399 11032 bytes
SHA-256: e45dc0640d7748abeb7964864695d7a8097fab461eac35717ec74352578ff02c
font_01_sfnt_off00010d02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D02 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012514.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12514 17572 bytes
SHA-256: 652562a4287cb83a8f4e742d8d8c18f83ffb707189bfeca92d53c3b90d659a72

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