Malicious PDF — malware analysis report

Static analysis result for SHA-256 abe4d7288d465395…

MALICIOUS

PDF

91.1 KB Created: 2021-07-07 19:35:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 128d536bce2ec2e3142e53127fe39c92 SHA-1: 1292ddf4a1021da988cc6e7602139e46d9d92d25 SHA-256: abe4d7288d465395c632744b841746f3234b87a7b8fa39b5b2a2bfd5fb20c8a7
156 Risk Score

Malware Insights

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

The PDF file contains a link farm, with many URLs pointing to potentially compromised websites or disposable hosting. The ML classifier and ClamAV heuristic strongly indicate malicious intent, likely for phishing or distributing further malware. The document body is heavily obfuscated and unreadable, providing no direct clues to its purpose beyond the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/kosanesowo.pdf In PDF document text
    • http://heldermusic.nl/ckfinder/userfiles/files/zejuma.pdfIn PDF document text
    • http://duquenne-moteurs.fr/webroot/upload/files/vebojilemiwotowumelovizuk.pdfIn PDF document text
    • https://artlabjo.com/userfiles/file/46254498632.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609ecabd3fcd1---gerikujuwejerosobibalere.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16094505875a98---rifagenogovojukilanuzexo.pdfIn PDF document text
    • http://gorisum.net/fckeditor/upload_file/file/42205637604.pdfIn PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/76a71e82215effa3d8c34492fbd2849b/sosuxu.pdfIn PDF document text
    • http://gamax-motor.cz/data/dokumenty/59926088699.pdfIn PDF document text
    • http://opuspoint.com/ckfinder/userfiles/files/suvejon.pdfIn PDF document text
    • http://lnianemarzenie.pl/userfiles/file/kopedaxazitotejugato.pdfIn PDF document text
    • http://baugeraeteverleih.de/benutzerdateien/vuzapu.pdfIn PDF document text
    • http://skupka23.ru/upload/m/gunomiwejowawekewomiwep.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9900324f62---79315612016.pdfIn PDF document text
    • http://northphoenixmustangs66.com/clients/4/4b/4b49b54eec06ebba3741256e9f3e6f2b/File/jaripixe.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1606d683080755---39399535251.pdfIn PDF document text
    • https://steammining.com/userfiles/file/5635220910.pdfIn PDF document text
    • https://dpengineers.info/admin/userfiles/file/71459206753.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/rojenamitax.pdfIn PDF document text
    • https://alarouba.com/ckfinder/userfiles/files/vedakumil.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/67f18a6130771214aed64bcd98c7663d/motig.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/73283cc4579b33c07d085e65e1ea955b/36712863902.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16075ef573831f---kidigumakeketigusupobodo.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9208e6c509---kevajuxiso.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/12322559842.pdfIn PDF document text
    • http://orvosvalaszto.hu/uploads/files/81241267047.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ae89d3002b9---mibonasumajotujimodo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=poems+that+will+make+your+best+friend+cryPDF 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_off0000fe24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE24 11276 bytes
SHA-256: ebe717018defabe6fe640cd3d3280e7afceedfa4f996f407946a21c55c4a0459
font_01_sfnt_off00011885.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11885 18108 bytes
SHA-256: 1bf3dafa502b9e83589d12183e7e05afc882fbc1c0064cdb8473de5db1706b36
font_02_sfnt_off000146d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146D4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1