Malicious PDF — malware analysis report

Static analysis result for SHA-256 20663177ddc010b2…

MALICIOUS

PDF

82.1 KB Created: 2021-09-05 12:01:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: e1b319550d60d8b6e9611c95cfa22363 SHA-1: 76c9fe1f312041094c6552cf73cfa2c7e58d7819 SHA-256: 20663177ddc010b290beea4fd3a0ea15459094b4f0dea0c13344fb5685f36332
156 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 links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and the nature of the heuristics indicate a phishing or malware distribution lure, likely delivered via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://garglob.ru/uplcv?utm_term=manifiesto+surrealista+libro+pdf PDF link annotation
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16088a58e22244---93743634233.pdfIn PDF document text
    • https://dildendilecevirievi.com/upload/ckfinder/files/30541392805.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608a9acd6a644---kosowaputekegez.pdfIn PDF document text
    • http://prosquash.by/data/tolokirigagilelewatuj.pdfIn PDF document text
    • https://www.kasekimi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077756a77dc3---lakodelufagobaxitawup.pdfIn PDF document text
    • http://cesishotel.com/res/wysiwyg/file/10995869509.pdfIn PDF document text
    • http://zerosquareonline.com/file/14982517952.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607879141867d---81850376923.pdfIn PDF document text
    • http://wxdyzs.com/userfiles/files/52764433717.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160cb473ba9093---89920842692.pdfIn PDF document text
    • http://tzoetemondje.be/uploads/files/46053682526.pdfIn PDF document text
    • https://pharma-tools.eu/galeria/file/14860242824.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/etuzutatigopijivux.pdfIn PDF document text
    • http://waypl.pl/upload/File/97244177055.pdfIn PDF document text
    • http://worldnaturalfood.com/image/upload/File/70112478741.pdfIn PDF document text
    • http://ecohouse-lab.com/userfiles/file/50298569014.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079a91847f3f---57729307438.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/bcc77a9be4b6eccdd86e8ec0ff2a6cad/71838648086.pdfIn PDF document text
    • http://daotaonhaccong.com/uploads/userfiles/file/86474329610.pdfIn PDF document text
    • http://maduraigarlandshop.com/userfiles/file/depebofemaf.pdfIn PDF document text
    • http://orourkelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/budogafuniv.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/9f7bchmphp5o15e8chgod4o7j5/94690360165.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606e1edd13808---muvidimuvedixo.pdfIn PDF document text
    • https://angkaganjil.com/contents//files/fufedebijizoniditirawe.pdfIn PDF document text
    • https://sealordhotels.com/ckfinder/userfiles/files/pawubajuz.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/lokbhpk6tlb5j03r86gb2n75m0/58578035239.pdfIn PDF document text
    • http://www.psychophonie-tarbes.com/ckfinder/userfiles/files/32675831698.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_off0000dbc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC3 18064 bytes
SHA-256: 9be73d73fa13b58190285a7131c503eb6c226d1a7680d678e0ff170179886618
font_01_sfnt_off00010982.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10982 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012199.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12199 10724 bytes
SHA-256: 4261025141c5164b1395da46e6a9b4911282334d172717c729d2528bba38f354

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