Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb80e6dbae96fc67…

MALICIOUS

PDF

92.0 KB Created: 2021-07-13 20:55:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: b111339a62cb04a71050b206c76cb9d4 SHA-1: c8fc6457239643a54c486e2441091e94ee0063a7 SHA-256: fb80e6dbae96fc671f5e068e3f226f80592bb90ce96b35cb79654aa902aa7a14
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting an attempt to lure users to malicious content or phishing pages. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were extracted, the structure and URL patterns are consistent with a link farm used for initial access.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://ceral.pl/ceral/pliki/file/biragedatabapopaxonaku.pdf In PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083336e5a34d---dikepase.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608e42a681539---fipixunilikafakivapajaz.pdfIn PDF document text
    • https://peterdegendt.be/file/94089135102.pdfIn PDF document text
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/f20e1b5f059b8ab40e2bcc69ba4697e2/86372867647.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/zoxoxuvigologuxesof.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/f766e3b4bd5da2ecf499ce13340f6f58/42216054243.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/gaos8vco4vfnraj001925ns9jq/98793611557.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/82223162700.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609a094bd5f41---92971772861.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/g9jobbg64347lathccm81bmju8/vozag.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/6ghj4oc4hu5ovgstbbqhr6rofl/xizidavimosalemibobe.pdfIn PDF document text
    • http://yfatc.com/userfiles/file/85138165024.pdfIn PDF document text
    • https://toptenstudy.com/upload/files/BodyFile__60B590E2D8ED4.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/78ddff1bbbcfcfbfebc6404e37af7ad3/likenivepu.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/edf95nbfpm6i321jbv9atvmpbi/95293357207.pdfIn PDF document text
    • http://hpworld.hu/data/pic/Image/file/mulezivalu.pdfIn PDF document text
    • http://tuclubcr.com/campannas/file/liwadobu.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608320247ce37---ponipokefabudokusozixogir.pdfIn PDF document text
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/41c2060012db877f42918d7517930e7c/40994384771.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160e606fe3732c---60735651924.pdfIn PDF document text
    • http://palyavalaszto.hu/teszt/upload/file/25658917528.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aadb800bd1b---sebifomibufipijigitetoto.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/hsqrps37ueo0n06jjs7g1f139m/36750800081.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=list+of+sins+from+a+to+zPDF 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_off000106ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106CE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011ee5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EE5 10212 bytes
SHA-256: 863f0103b0ae9cea120ce9f306ecab3358771e0f7609e399bf1a756dc61aacb8
font_02_sfnt_off000135c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135C9 17284 bytes
SHA-256: d98e473168c5817413a7aa7a8fdb7c5c3125129759acb61e542e5ab9f5f16964

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