Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6b0d1f1acf0f7af…

MALICIOUS

PDF

87.2 KB Created: 2021-07-19 16:43:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 220abe499d860af0a6dec818517b9dbf SHA-1: 446cb1266c284b4504a13fa7a3c468794103aa84 SHA-256: d6b0d1f1acf0f7af91760400dc1f28ce4f31e5c00d7ed9381e4a5666adbf5f81
156 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to numerous compromised WordPress sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of multiple external URIs and compromised CMS upload links reinforces the conclusion that this document is designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f7ec5ab3b5---jivev.pdf In PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/bf7b0eca719524b8a5483521bba0a67a/pewimosaxer.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/647157864.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/535d4f55e493c29c58b1ed49a7403016/tutowafufedemuli.pdfIn PDF document text
    • http://alphanaturehk.com/userfiles/file/bojufafuzifal.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/6ec0a87d8963b78ed965ff2f57e7f0c0/80876765730.pdfIn PDF document text
    • http://shuimotongyuan.com/userfiles/file/38926469681.pdfIn PDF document text
    • https://marmarases.com/upload/ckfinder/files/risuwuwibekal.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16098c5d861173---34261985442.pdfIn PDF document text
    • https://propertiproperty.com/Uploads/userfiles/files/pojabugajujajuxawajugu.pdfIn PDF document text
    • http://am-assets.com/aom/magnolia/userfiles/file/72655305492.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095ccf096c8e---dixosajof.pdfIn PDF document text
    • https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/5u1jq9j83ni0eg7r6h01su43v6/20414984485.pdfIn PDF document text
    • https://marosme.ro/hirek/file/55427997976.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/2aba56056a96b93b94bd5f53d0234a61/67116323810.pdfIn PDF document text
    • https://ikima.fr/uploads/file/90612549586.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609b58e5c6a99---kezobej.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16082029e6d804---96019123486.pdfIn PDF document text
    • http://jrmhandling.nl/upload/file/42670649003.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/33bb68faf6fc153a26d0a7488bc3ffdd/28977601186.pdfIn PDF document text
    • http://imbirimbir.ru/files/runibuxemawopenadinesi.pdfIn PDF document text
    • http://hutbephottaihaiphong24h.com/upload/files/32455587633.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=uncontrollable+hair+syndromePDF link annotation
    • https://medlineplus.gov/genetics/condition/uncombable-hair-syndrome/In 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

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_off0000f146.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF146 17524 bytes
SHA-256: ebad312caa21c541b74bf9b8eb388dffd3ba77f8dca1a1ee38b77cbb21a5e72f
font_01_sfnt_off00011e9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E9E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000136b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136B5 10896 bytes
SHA-256: 2bd1bce03e2c1ee3856d541f89d760b2b1e743de146842cbc7934c15c00329a4

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