Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8e07fc5eb6d3d5a…

MALICIOUS

PDF

81.7 KB Created: 2021-07-13 20:59:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 6a003cd76308131c6d2748ef76c504a4 SHA-1: 7b7dbc666bb22c4c6a449ba879fac811808b74b0 SHA-256: d8e07fc5eb6d3d5aae1fc3d835a27bb6d23732052abe641d2a7e0204a2222fb0
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites and other disposable hosting, likely intended to lead users to phishing pages or download further malware. The document body is unreadable, but the presence of many external links and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggest a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/ac58f3f68c4dae3b67948b821cc6b921/14295642822.pdf In PDF document text
    • https://elearning-chemistry.ro/userfiles/file/pojupeginoduxodos.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608288aea6f1e---tilijapemusukonitakavitu.pdfIn PDF document text
    • http://limuzine.md/userfiles/file/50976087848.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/b7573059e74e40c648f844a59718d015/wetoreludi.pdfIn PDF document text
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/ldp09bab6ns534eki48re60r51/81325298399.pdfIn PDF document text
    • http://hcvitamin.com/webroot/img/files/subad.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/v0ber0l39qg77elpt81lnk8g9n/zotelufamadawomujuxeziba.pdfIn PDF document text
    • http://www.irrv.org/uploads/files/16269365210.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/msmg8m45ug92n613o1u8te2r3m/xivebovodagekosixurogimep.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a109ae064ed---tupigomudawavuviwipixes.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e8b61002ab3---4248817215.pdfIn PDF document text
    • http://dush-kz.ru/uploads/fck/file/sisuxadoripuwekifobanu.pdfIn PDF document text
    • https://europawindow.com/app/webroot/img/main_content/files/50187519110.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1608a1138ad18e---fuxofimumidozekod.pdfIn PDF document text
    • http://edanieltour.com/FileData/ckfinder/files/20210528_A9FC0310F3B705B2.pdfIn PDF document text
    • http://gospelinamerica.com/clients/874377/File/42619962407.pdfIn PDF document text
    • http://gayaarchi.com/userfiles/file/20210713211151.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb07940383---35927592766.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/38846856542.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=87000+square+feet+to+acresPDF 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_off0000dcef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCEF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f501.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF501 17112 bytes
SHA-256: 1d0e12e1a98c55b811c6d4be67f87b20bcce525e044e543fe589dbc127ed3ddb
font_02_sfnt_off0001219d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1219D 10616 bytes
SHA-256: 4e5edb2c2519a9ae86501865d23d063320730b0702609602b91fa8d63580dde8

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