Malicious PDF — malware analysis report

Static analysis result for SHA-256 68e08ab73fe2226f…

MALICIOUS

PDF

181.1 KB Created: 2021-08-16 09:17:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 89474ebd26a96d6031054eeca3fa9347 SHA-1: 22fc97ae577b5d51f1fdf24b7fa7df2e51050771 SHA-256: 68e08ab73fe2226f6864490049ac65da20dd5a8a98534643693eee220b802c60
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malware distribution or phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9476

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://sonsuadogo.org/Images_upload/files/98660165523.pdf
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/lkgcm4dj0jgptq99aj7vbbt09h/29697354207.pdf
    • https://jotekonybakterium.hu/userfiles/files/zovemoxogituvasidaruforav.pdf
    • http://ruegen-ferienhaus-schneider.de/userfiles/file/towirevulewoxiguwisike.pdf
    • http://thechelseaff.com/user_uploads/files/52449837558.pdf
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c91f5d1261b---pinonekiwirozedu.pdf
    • http://jcbcharpentebois.com/ressource/site-image/files/82485615007.pdf
    • https://burgas-remonti.com/userfiles/file/45509600693.pdf
    • http://inistor.com/ufiles/files/susivefurifex.pdf
    • https://www.mediawerf.nl/bundles/store24backoffice/ckfinder/userfiles/files/witidazibazap.pdf
    • https://manhremhoangvan.vn/wp-content/uploads/files/sojikitababexemojukel.pdf
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160814054b34dc---74417606162.pdf
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/0oghoj36n96mbqltrthnbhpos5/71320340928.pdf
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609832591c579---rusomekapapupumiv.pdf
    • http://greatnice.club/updatefiles/file/89116996320.pdf
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/g6g82rkc482fk0g18spv5fkgc9/kebeduzazenekifujaze.pdf
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160b8b2c75e0b6---rosewigafunutobopoti.pdf
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d95a635f6b8---xipijamowadotekofes.pdf
    • https://jordan.si/dokumenti/file/loputejujomijapuro.pdf
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/12bd3f03bc001cce046fd32b219dc0e8/73888389298.pdf
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16079d084c1340---14969133517.pdf
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5eaf60421---50526958020.pdf
    • http://aviatechinform.ru/sadm_files/97025832450.pdf
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160862c66dc470---3275342452.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=fundamentals+of+classical+arabic+volume+1+pdf
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00023a92.bin
b6357695c6705713ed9f8b61f49a345720c0cddbfb3191fdd5c5f75e52a71029
pdf-font-stream PDF embedded font (sfnt) at offset 0x23A92 26528 bytes
font_01_sfnt_off00027960.bin
81f9502051ffe82a93e116314b16834fee10a3a310570e91963269c98c8defee
pdf-font-stream PDF embedded font (sfnt) at offset 0x27960 11116 bytes
font_02_sfnt_off0002931c.bin
72327b0f5dfc25981f50633fb574e9e79ec37ddcc17a77a7f5c2b2fec8da2a51
pdf-font-stream PDF embedded font (sfnt) at offset 0x2931C 7620 bytes
font_03_sfnt_off0002abfd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x2ABFD 16792 bytes