Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f26498bcfb3e385…

MALICIOUS

PDF

82.1 KB Created: 2021-09-05 20:24:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c3a19a15bdcd93be382ab252295e56f3 SHA-1: 5857e6e3ff4fd9893b8aa02bd0652201cc3a65cd SHA-256: 6f26498bcfb3e38595c48337f51356fd9d16b84a53087f292ffea6d5125698c3
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to compromised CMS uploads and disposable hosting, indicating a link farm designed to redirect users to potentially malicious sites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://catbasailing.com/upload/fck/file/maxenafopeviwovipewel.pdf In PDF document text
    • http://sva-jeanroze.com/xmedia/file/mutesirejegup.pdfIn PDF document text
    • https://www.alphaveneers.com/wp-content/plugins/super-forms/uploads/php/files/a5837f8bc673857646fa02b364439e81/sakonavujulad.pdfIn PDF document text
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/bb072749d95e023b9db16a3a90ea7fc1/84455320190.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee5f2c35536---85094908213.pdfIn PDF document text
    • http://biomassasia.net/data_ed/userfiles/file/razorikopijomipugi.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/kr9p6r657n6kk4v867hgltn283/fipofaguzikanek.pdfIn PDF document text
    • http://timapools.com/uploads/files/40647275254.pdfIn PDF document text
    • https://dodomacnosti.net/data/file/gujeseme.pdfIn PDF document text
    • https://funke.be/data/file/sidozuwi.pdfIn PDF document text
    • https://www.hsbofmn.com/ckfinder/userfiles/files/xibepijufopaxiju.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/ad1ab25afb7cb675e0c70b4ce0cd5c64/gerizopotojobepelab.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/48762269465.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/8adb3b129ea2297aeddf916a2c6e8744/28106304371.pdfIn PDF document text
    • http://robinsonfamilyreunion2021.com/clients/7/77/7769cd5c98d63cfb9738ae2db1c5c42c/File/5694020892.pdfIn PDF document text
    • http://jtour.vn/userfiles/file/kativegewi.pdfIn PDF document text
    • https://sgcaregiver.org/contents/files/zubuzopivovuvijuxonedunur.pdfIn PDF document text
    • http://supermarketdv.ru/files/file/2528237282.pdfIn PDF document text
    • https://gites-les-bardots.com/userfiles/file/wadewada.pdfIn PDF document text
    • http://bukharageorgia.com/sites/default/files/file/84986191357.pdfIn PDF document text
    • http://lnaixi.com/userfiles/file/20210725104120_20831052.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160cc304dcef6c---talupetunaforof.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=rockshox+boxxer+team+service+manualPDF 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

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_off0000db21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB21 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF338 11040 bytes
SHA-256: 7183e471982bd8c5501b99b99e7d228c975d0d345fbb90f0563e9cae625d2c5e
font_02_sfnt_off00010ccb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CCB 17824 bytes
SHA-256: 17c2a16599b97fc4f6d8bbbf2c923a89b2abee48ad37538c8fc841870145c042

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