Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfe183c667b46249…

MALICIOUS

PDF

150.5 KB Created: 2021-07-19 17:17:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 1a7ec0ec87295ca93e967b78646b6832 SHA-1: 67fdd6f9527f1dfac93b2f03cd8fd45c1505445c SHA-256: bfe183c667b462495b176b975be8973bee3cb030966ac799ceae93cbdec4d230
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting, designed to redirect users to malicious content. The presence of these links strongly suggests an intent to lure victims into potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://domesticsolutionsagency.com/userfiles/file/51340210829.pdf In PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608c7c34e6e06---73190458991.pdfIn PDF document text
    • https://shopinhome.com/ci/userfiles/files/2301068709.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/59119cdd8bb79e9fa9faf9d9dbe192f2/xisoseveteduj.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac27a26b256---55139579151.pdfIn PDF document text
    • http://coyada.com/up_images/up_images/povewatiri.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adec8e7d7ca---kufematapimivofew.pdfIn PDF document text
    • http://granitemountainranch.net/userimages/gaxibudanux.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9b1fa181d---34179615465.pdfIn PDF document text
    • http://casaperferiesantamariagoretti.com/writable/public/userfiles/file/vovabopuw.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160ba9a09ad609---4615053410.pdfIn PDF document text
    • http://privateeducation.sg/verzsape/demo/upload/admin/files/48911702288.pdfIn PDF document text
    • http://omgmediatank.com/userfiles/files/7863432474.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608327068f247---73711595815.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080c8a302d36---fumuwawunuro.pdfIn PDF document text
    • http://palakkadtourism.in/ckfinder/userfiles/files/xasawoxatabomakazuwovi.pdfIn PDF document text
    • http://fritz-fahrlaender.ch/download/4992026442.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/02f4301e32895258978385b3b68988b1/89554090505.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/ad155bd981edb96fe62110d482451873/24611612699.pdfIn PDF document text
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/bbc2445b7f95b4abc30a3494fb884ec9/devazafukisipadosiwuboxot.pdfIn PDF document text
    • http://zrdb-drogbud.pl/Upload/file/koketewewevugudip.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/s606c7lib746d0he6ivkm0l764/wupidosakenumefenozeno.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/walonotuv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=definition+of+voluntary+response+samplePDF 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_off0001e2e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E2E1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001faf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FAF8 10800 bytes
SHA-256: 346969a26c8f3242a2e8b73fa8e2fb5930f4a6c4d85ff44d6f7e16837f581db3
font_02_sfnt_off000213e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x213E8 21988 bytes
SHA-256: 950dbafa893b1ff1c9e584d63203ff8cfea0be24a5c1b98e5e4773274281e3a9