Malicious PDF — malware analysis report

Static analysis result for SHA-256 2db30c91d5e9486e…

MALICIOUS

PDF

90.9 KB Created: 2021-07-26 02:05:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 6f041dfac08c3e788d37f9809e0b69b6 SHA-1: d69a4c256563b678f3cc9a6271111c9b096609b5 SHA-256: 2db30c91d5e9486e77d64820aa94faf82ea68fca05da52f6b56218bac080dc9c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm hosted on compromised WordPress sites, likely intended to redirect users to malicious content or phishing pages. No scripts were extracted, but the presence of numerous links to potentially compromised domains suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082761906b5f---72717140471.pdf In PDF document text
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/a9c47b9eff0cfc8b20348ff92192849b/mulusewelize.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a756347a6bc---dukuka.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/kfo01l6e28483r0ju4jl9l55hn/35736115077.pdfIn PDF document text
    • https://universal4shipping.net/userfiles/file/jatusepetatedaxu.pdfIn PDF document text
    • https://www.basur-tedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f2f5b7dd24---dotoku.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160811517ed009---62647908798.pdfIn PDF document text
    • https://stcc-sa.com/motakamel/Ups/files/87358049339.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/qr61bn23frv061s9h3lt5im6qd/likuwotex.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608624fdc405b---pusalusogazapufiropagored.pdfIn PDF document text
    • http://edsmithestate.com/clients/8/8f/8fcea3baa00381bb68ca4dcda22eb4c7/File/97651697442.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/1b616c562ae4f9fcc046fbb971c4dae7/kagoniledi.pdfIn PDF document text
    • https://topclassgreenery.nl/images/file/zasom.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1608b3c4b62fd5---kipibatakisetunaxuvugebiv.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/a219d7c56775122f9de54c827c6b39c6/43861990428.pdfIn PDF document text
    • http://kidsjeodo.com/images/files/takuw.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc41e75a39---33305481099.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/e4a3c53963e2ed14ce0aaaba4f60c946/fudosiwubovepolad.pdfIn PDF document text
    • http://lelit.nl/app/webroot/files/userfiles/files/66032331648.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/h9r6ui0ilgq0kf85qbepd6cah2/zonixulilife.pdfIn PDF document text
    • http://stpetersame.com/clients/9/91/91902b33218228c9a3691be2563b71f1/File/nosinirimiwofewalabiwasaf.pdfIn PDF document text
    • http://www.gleason.com.au/application/third_party/ckfinder/userfiles/files/2671473051.pdfIn PDF document text
    • https://cottonweb.net/userfiles/file/kemujezozu.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/987947581b341a90fec92329606eaaed/femixefenawika.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=what+are+self+destructive+behaviorsPDF 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_off00010155.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10155 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001196c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1196C 10768 bytes
SHA-256: e9fa359659d9bbcab40ff914cab239d58aa6411fd9e3eac6886ea16d4b96f3dc
font_02_sfnt_off0001325e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1325E 16284 bytes
SHA-256: 2e0590f6d166b132c47587a7a5daccdb0c5385e06c7497748ae2745c17625d08

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