Malicious PDF — malware analysis report

Static analysis result for SHA-256 72d9ca68a9b23f2e…

MALICIOUS

PDF

93.0 KB Created: 2021-09-06 07:46:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 819cea60d2bf193dc6d0f938623cd519 SHA-1: 38898b1ded88d141c5175e51757215aa25c448fe SHA-256: 72d9ca68a9b23f2e178368df4caa081bad1b53afe084c510a78d63e1d36a448c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to potentially compromised WordPress sites and disposable hosting, designed to trick users into downloading further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the overall structure suggests a lure for initial access.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b45e0a94305---50004501260.pdf In PDF document text
    • http://offerparts.com/upload/files/60618325773.pdfIn PDF document text
    • https://www.shropshirefurniture.co.uk/admin/ckfinder/userfiles/files/78916991017.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b7fdeb71ee5---19262910860.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16085c53043e59---gabezufes.pdfIn PDF document text
    • https://dubaimotorcycletours.com/uploaded_images/files/pasalodolatozevowax.pdfIn PDF document text
    • http://compsult.net/userfiles/file/72590788271.pdfIn PDF document text
    • http://asirakademi.com/resimler/files/35248446292.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4f9bbac62---76498235811.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/a318156925a3f41d95fb41ffdf31071e/jebixiwagivizumoruzi.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1eeb81af1a---18306133244.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/013b8748695e78b6b6e6ce8244a9e1ce/62154186552.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b63c0a20c04---89105706339.pdfIn PDF document text
    • https://minipowerpack.net/upload/files/10343064622.pdfIn PDF document text
    • http://saptpadi.com/files/file/lebibafapifuvigivalo.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/282bf8d585f58709b7cbb6af29735c11/pamafilijunolumavajigof.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/8f53271a307a6b67dfe2c2ea4bdcb415/jewufasabe.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/161342169adcb9---vizunatabinuvuji.pdfIn PDF document text
    • https://sweetburden.com/upload/users/files/zoruludibemokodelegazin.pdfIn PDF document text
    • https://mayxaydunghoangphuc.com/userfiles/files/xaxijavejujavelojemilexu.pdfIn PDF document text
    • http://gianphoiduyloimodel.com/Images_upload/files/novewemavukakubametukif.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/05b66bf16a29618abb72e6c8aefcb016/91272919960.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=hr+training+and+development+project+report+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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001048b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1048B 18484 bytes
SHA-256: 29bdd6c3744c09c5d4cb1d83771f2c9e4117fb59a1a98188549fbd73de1902a7
font_01_sfnt_off000134e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134E1 10980 bytes
SHA-256: c3e3d10895c9c80a317a6b79f75bb3e08546719193bf1154c4e0d93ade460d91
font_02_sfnt_off00014e11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E11 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1