Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff5ae02c32895544…

MALICIOUS

PDF

84.7 KB Created: 2021-07-15 19:09:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 11b0c4e5ca8a9f34b66c33341faae477 SHA-1: ac327110aefce0f1bb401b9b674f06af6991f152 SHA-256: ff5ae02c3289554411c9f65b062331091fb95e1b0ac6595c00d53684ff106384
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised or disposable hosting sites, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to host malicious content or redirect to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://dynamic1984.com/user_file/file/26355053751.pdf In PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/941668c0b0e709980b99928761c5457c/38696113515.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/d454d28e9e1c2df845e07a7795564e3f/79451700956.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4b3e4ae2ae---xefikixima.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/e99e27128cc47cee225f49ba5c53f367/dugiga.pdfIn PDF document text
    • http://apexibd.com/uploads/fck_uploads/file/16997783782.pdfIn PDF document text
    • https://audit-advisers.com/userfiles/file/lexikoliduwamum.pdfIn PDF document text
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/99cc6619e70e2b7aa1cce3aee9744779/jokolelezupinemovudus.pdfIn PDF document text
    • http://avonsteel.com/UserFiles/file/mupufafaseg.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/c160858b71182889af307bc45fdd36d4/83629249569.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/ae24b0f641da9e0fc978029ee411b2b2/miwivobaperen.pdfIn PDF document text
    • http://55pluscommunityspecialist.com/userfiles/files/povolitepusatapovuzaxaz.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/38899920694.pdfIn PDF document text
    • http://alexanderkanevskyartgallery.com/clientMedia/file/bukideziti.pdfIn PDF document text
    • http://htwy.com/upload/file/36400953353.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/f4c63e535b93330bfce8028b7917ed17/23470596913.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/32f42fa5b1ea310fba0f6bca03dc6de5/wekulujiv.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/bcbd5e01bab4c0bf3c06f7fdfbb5578a/81154344054.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/9a77ef8455620e5aeed056ef83830442/24811976124.pdfIn PDF document text
    • https://skvely-kup.cz/files/file/50331811449.pdfIn PDF document text
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/dslo1deppfj7dhuns8lqb8t0v6/jerijixuvafunorinabusosug.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=sniper+data+book+pagesPDF link annotation
    • http://pro.ovh.net/~tribuene/images/banque/file/lezapuwudenorujuxevefegek.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e746.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE746 10828 bytes
SHA-256: c899af678b6306fc90fbc69cdcc3babb7c0c1299d88bceff43cb37859588bcd5
font_01_sfnt_off0000ffed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFED 17608 bytes
SHA-256: 0b739dbcb2217ff09ca536c97bd5a233a082b47bce0c41afd99c5c8fa397d60f
font_02_sfnt_off00012e23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E23 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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