Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff7adc2799cd2cea…

MALICIOUS

PDF

111.0 KB Created: 2021-08-03 23:58:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d2f47614f10f86e494465ecffdb43382 SHA-1: 9a5a03921edaac725fd5d7ff7c5a982ece7149ab SHA-256: ff7adc2799cd2cea5df44ec367006b3d9391db7a8a97f5dc4fb31708409dd14b
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded links, many pointing to compromised WordPress upload directories or disposable hosting, suggesting a phishing or malware distribution campaign. The heuristic PDF_RANDOM_URL_LINK specifically highlights a link to 'doublehappyvstheinfinitesadness.com', indicating a likely attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://xn--9p4b29dncp2cc6y.net/upload/fckeditor/file/93319045108.pdf In PDF document text
    • http://originalavto.ru/userfiles/file/49638750544.pdfIn PDF document text
    • http://rocincorporated.com/domain.com/images/dynamic_pages/file/94436052283.pdfIn PDF document text
    • https://roweryelectra.eu/app/webroot/uploads/file/16211106798375.pdfIn PDF document text
    • https://xn--80aanugxqi.xn--p1ai/admin/ckfinder/userfiles/files/9746231780.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/sij69a0gnjgfrtc38rrkl27fc2/84554608571.pdfIn PDF document text
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/9d2289172f887591c328419a289e7bd9/kamedulakezode.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/k2ugobvfp7jbn9243tktb9cfk4/kuxedovolitogebewomopa.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160869ef019aff---8333650861.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/4806eb246d806444fbc9e34a22e510c5/gekavuroro.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c8dee3385dd---lopakuvixenem.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/1608a9a8f07ac5---janomuzijaxezopatat.pdfIn PDF document text
    • http://doublehappyvstheinfinitesadness.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a591e1ab872---gizamonokapipisidizofuzo.pdfIn PDF document text
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/9f88c3f8c71b9e30ce58c0d84e3a0ee6/fiduwapawumewibidop.pdfIn PDF document text
    • http://angelescare.com/userfiles/file/ramejalozuxazutet.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080da4603759---32430042271.pdfIn PDF document text
    • https://teenvolunteerhouston.com/wp-content/plugins/super-forms/uploads/php/files/cf58c638660e3c51564da6b79b5088a7/luxujenawibisavida.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=ejercicios+de+excel+avanzado+2013+resueltos+pdfPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010ee5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000126f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126F2 2416 bytes
SHA-256: 368b5c7dd70f2b99d539953a38910474f3b889fab9e1ac80c9d628f0e619142c
font_02_sfnt_off00013188.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13188 11520 bytes
SHA-256: 4fd4466dac030560d2f1bed50b34a9d91e57e3a4c2b66964f5c20647b7abd744
font_03_sfnt_off00014d0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D0F 17648 bytes
SHA-256: 5be8c184a91caabc9ba03a5bda5e8923aea63c2dc7ebb5c04f560a7617d50884
font_04_sfnt_off000168a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x168A9 26032 bytes
SHA-256: 3414dcc05243d46c232ad244beb800417beb13f05ce96de676459193c3f86aba

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