Malicious PDF — malware analysis report

Static analysis result for SHA-256 06f9e4741a88ec2e…

MALICIOUS

PDF

83.7 KB Created: 2021-08-24 19:56:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f426354e43812b4e911a1325dd996661 SHA-1: 76c90f2d1901538d61258a4ec36ec2c5c3044f95 SHA-256: 06f9e4741a88ec2e9dc3971454f9a27ea6a14242c916fb9a75b32f40b1e369fc
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, distributing numerous URLs across various domains, some of which are hosted on compromised CMS uploads. The primary goal appears to be directing users to external sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

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://karate-talence.com/newsite/userfiles/files/20240366.pdf In PDF document text
    • http://vankouwenenmastop.nl/UserFiles/file/jititovupapezejazubasov.pdfIn PDF document text
    • http://aifamilyreunion.com/clients/59202/File/27501688264.pdfIn PDF document text
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/47559204716.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/16089f0c7d4546---fafabeperanotozinutupag.pdfIn PDF document text
    • http://joyearland.com/ckfinder/userfiles/files/navepifomos.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/254b0f2a90cf3029ade1919fb92b9036/detavabemadubasesuzasuzuf.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/0e75992029ff4345f1d666c4c8ec8c3e/31823139051.pdfIn PDF document text
    • https://ladangmimpi.com/contents/files/zadagib.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/0a0a1ad5f8d0f7ee0d0508cdceaecc77/76075530578.pdfIn PDF document text
    • http://alexhofford.com/temp/files/file/majawuwifelonuladesil.pdfIn PDF document text
    • http://kancelaria-perfect.pl/app/webroot/media/files/10181906398.pdfIn PDF document text
    • http://aranykoronakft.hu/userfiles/file/fuxigurojivuwofiravorirul.pdfIn PDF document text
    • https://citytrafik.nu/images/file/makenekobetij.pdfIn PDF document text
    • http://amandamaitland.com/images/file/wexazekidot.pdfIn PDF document text
    • https://brickzoo.it/file/24675043729.pdfIn PDF document text
    • http://tvsatkrosno.pl/userfiles/file/78182191222.pdfIn PDF document text
    • http://ducthoaudio.com/upload/files/gomuraxakidim.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4f30b07f93---monemonovigirawi.pdfIn PDF document text
    • https://gifarlcm.com/upfiles/editor/files/wiloputug.pdfIn PDF document text
    • http://ownlines.com/upfiles/file/49671998672.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160f1e84051b19---sufatitebapog.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160fd6cddbb5ac---xanupawubijolax.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7dcd4ab267---29275026680.pdfIn PDF document text
    • http://lbhs1965.com/clients/6/6b/6bdd8f708684a1f547efbf97e1630fe5/File/zupuki.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc6510f7e3---767801632.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16115a74b5161c---78820773669.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=how+to+get+the+red+lightsaber+jedi+fallen+orderPDF 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_off0000e236.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE236 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA48 17128 bytes
SHA-256: 44ea8eff87dfe808233856de81fa67f6e6e5df2a32ca957f4a0ee44733998d9e
font_02_sfnt_off000126ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126EE 10980 bytes
SHA-256: a679529fa223cd96cbdf480be47007e4334a83ba02dcecf69ec8e141196bccd4