Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0862610796f374d…

MALICIOUS

PDF

105.5 KB Created: 2021-06-26 03:12:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: abbb6c306b90cd43a68eb8e15fedd755 SHA-1: f70e66696fe269f382e61d97970e551dca45307d SHA-256: f0862610796f374dc6ad081c9cf8f7a565ee9d7e4d121ed28295ba2b0637f477
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9933

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 http://www.pranabkumar.com/fckimages/file/73019641851.pdf
    • http://brette-animation.com/userfiles/file/dofejilodo.pdf
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/d93ed2ebca5c667a7d28af42bb62099c/taxugabaj.pdf
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//53538623473.pdf
    • http://prestopc.it/upload/file/musojow.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/ouffn84nc9q30uil0b08hpopk3/77622937073.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c204535763d---tufikoloxuwopoxopavufiwib.pdf
    • http://shethof.ch/cgi-bin/dynamisch/file/89747614740.pdf
    • http://davidlbrooks.com/clients/868292/File/jugofalowogeliwizinut.pdf
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/bazanuzosabafatu.pdf
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/279138ec94c4f808956b333ea07e516e/nutuxebopulixuxokoxada.pdf
    • http://chronocertif.com/userfiles/file/15432888530.pdf
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607920b780b52---sagojigiruxisita.pdf
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087acdcb4ced---zawawiragoxujutipepaz.pdf
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/4a7afeff1eefdb85b90dec3e7d9a2bff/25242655905.pdf
    • http://xaydungphongphu.com/uploads/files/fabomepefegizerud.pdf
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609423551d206---43187982020.pdf
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/16079a69a503f5---40020191178.pdf
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/e12fd4af0c37a375bce4bd5a46aad82d/32972988670.pdf
    • http://cpgny.com/userfiles/files/61181828638.pdf
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078a18aebbae---zurukijixowana.pdf
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bdb5217a8dc---tevokateramugukewiwoze.pdf
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/aaaa6f27291e60bcf5417b6cefadc47a/27313805753.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=why+do+i+get+hungry+so+much
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013994.bin
3783894b057f1e77803ebfed9fbcecf1b8230d632fc1e0fc9ad4a8f7e35e13aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x13994 17344 bytes
font_01_sfnt_off000166aa.bin
f2a7d082facfc8a9d0cc4a5ee98308251860b1b7d66d0105f89523f34aba4c47
pdf-font-stream PDF embedded font (sfnt) at offset 0x166AA 10816 bytes
font_02_sfnt_off00017f43.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x17F43 16792 bytes