Malicious PDF — malware analysis report

Static analysis result for SHA-256 0397ad8a1a50d943…

MALICIOUS

PDF

95.4 KB Created: 2021-08-11 11:54:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 673345af04dd60a91bd1dcbc9cc82f97 SHA-1: 399c6269e5549e48221e371f283d15d131177f79 SHA-256: 0397ad8a1a50d94395deb0e6cc293aef0a947d9de3d8a0fae780681d260c0ddf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links pointing to compromised WordPress sites, suggesting a link farm designed to host and distribute malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and URL patterns are consistent with techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160abf48ec999c---bawedajedegewopugifo.pdf In PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16081779684cf6---kinibigolobezovozo.pdfIn PDF document text
    • http://arcos-eff.it/userfiles/files/xakidalamafowuvemivupoba.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091eb7eb52de---tozipumo.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a474448aeef---9897570870.pdfIn PDF document text
    • https://dcmheavyequipment.com/admin/images/file/ritoxenegutezijuze.pdfIn PDF document text
    • https://xn--arbeitskndigungsrecht-best-5zc.de/userfiles/file/40099068101.pdfIn PDF document text
    • https://vegas-shop.net/uploads/files/42140790123.pdfIn PDF document text
    • http://sun-green.eu/ckfinder/userfiles/files/49257957711.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/160b77de8a7dfa---31629103163.pdfIn PDF document text
    • http://digifast.cz/userfiles/suwesigufimenapala.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e77c4bf3c4c---kuniroperedejasaji.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/xuzeripax.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a2c929474e---78949568047.pdfIn PDF document text
    • http://bycongroup.com/UserFiles/file/17214930815.pdfIn PDF document text
    • http://lbhs1965.com/clients/6/6b/6bdd8f708684a1f547efbf97e1630fe5/File/58517428974.pdfIn PDF document text
    • https://epiphanych.com/images/file/viboroligelivotizet.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/4c03303b79bf6436a5db215efb94cd48/23433294998.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16084cefa52a1a---54517673409.pdfIn PDF document text
    • https://discovercefalu.it/_data/images/file/63991645871.pdfIn PDF document text
    • https://feltshoe.com/userfiles/file/jolamamar.pdfIn PDF document text
    • https://cambodiaangkorhomestay.com/userfiles/file/86662704189.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=download+lightroom+mod+presets+apk+2019PDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4DD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010cef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CEF 17356 bytes
SHA-256: 39496e6ba9c4bb159e1fb721290d3274c60e7887e186dffcf8f6eb9342a2eaa6
font_02_sfnt_off00013abc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13ABC 16680 bytes
SHA-256: 3c3e7d6ade04958cfbea21299068071ceea9f8437ed1469117f33a9c28b3d02d
font_03_sfnt_off0001520a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1520A 11480 bytes
SHA-256: 4f08042a5f807be37be9dce308826e8d2948dbfe141f20e7a58f8e6cf8b4b392

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