Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6b361403d701cab…

MALICIOUS

PDF

80.5 KB Created: 2021-07-13 14:14:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 4243c301268cede6b5b0081d249fd3f7 SHA-1: 57a6202be60e5de99ab348259e6001f5e982aae3 SHA-256: c6b361403d701cab7e3c15042a90488cfc1d21f6fda84e8bc669119d527ca5dd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites, suggesting it's used to distribute phishing content or further malware. The presence of multiple distinct hosts and the use of 'utm_term' parameters in some URLs further support its role as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://archism.ru/uplcv?utm_term=current+bedding+in+geology PDF link annotation
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/tdqq21ijapcrnhcfaafn88hb3h/nosesisu.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d42eea2f2e1---lomuwi.pdfIn PDF document text
    • http://feldbach-tourismus.at/files/1109552542.pdfIn PDF document text
    • http://whatdwellswithin.com/file/34958698507.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e1f83e8c7---wuvoxepasunoduroxo.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aad1c8ab4f1---jakubupebonexabifolageji.pdfIn PDF document text
    • http://macautemple.com/userfiles/file/lipelebojaw.pdfIn PDF document text
    • http://sintellect.ru/Repository/file/81939666914.pdfIn PDF document text
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/475fi4tp0upau9g0e7bs9e9mv5/magawejunozunene.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5d76ca2226---22449358806.pdfIn PDF document text
    • https://moto-trend.cz/public/files/fck/file/1952908801.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/a16da7e93a5d31f4defc4d70ff45f2aa/13685009227.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a93fa370360---91536637124.pdfIn PDF document text
    • https://aquaprosmart.com/userfiles/files/76761645011.pdfIn PDF document text
    • http://www.teeintact.com/admin/fckeditor/editor/filemanager/connectors/php/img/file/pumupudusagapezelefowajim.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/1d7871f5ac2585e260895f5d142942a4/digugexopagire.pdfIn PDF document text
    • https://energooptima.hu/upload/File/vawig.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/85f89a17d8a1c3b0a4d92ec068019fd6/pebezuxafovokopafoza.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/k7psor4ddbcjvap7el46g63110/dixez.pdfIn PDF document text
    • http://argol-editions.fr/userfiles/file/tazogit.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/495d794dce238adf5217d922705ad022/57307048039.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606d19f0ce0c9---wegexiwujuxuxawamaseb.pdfIn PDF document text
    • 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_off0000d977.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD977 16732 bytes
SHA-256: ab298fe0af2b8625011148891038aae5f727f782f221e48aa500ed788a9348c9
font_01_sfnt_off0001050e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1050E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011d25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D25 10476 bytes
SHA-256: ca2f2b15f2b53c127340de8eb495dd5dc36b80baf6f6cd5a74a2677b220508ce

Open this report in the interactive analyzer, or submit your own file for analysis.