Malicious PDF — malware analysis report

Static analysis result for SHA-256 351addde3eee7f7a…

MALICIOUS

PDF

84.6 KB Created: 2021-06-30 22:01:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2bc2651b570497e874d2bc9a61f41dad SHA-1: 98bf0e40162e819f612a8e1113e0b4e1bae865db SHA-256: 351addde3eee7f7ad93605294e5e708d3f5ae818186a5f95e79e27d869142ce6
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links pointing to compromised WordPress upload directories and other disposable hosting, indicating a link farm designed to redirect users to malicious content. The presence of these links suggests an attempt to distribute phishing content or malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/033981007357cdc4fdb71d8bf9805b0e/xunatukoliviruxuvajapol.pdf
    • http://gagutp.com/sa_upload/userfiles/file/20210529023027.pdf
    • http://coss-wynn-reunion.com/clients/d/db/dbe3622004495b304d8703879a486b7d/File/nitisokurivef.pdf
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c13fd97177f---70997125413.pdf
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/h98lcqhbetcer3k7628od94or2/mojabapelamusitenove.pdf
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a3ea724f1b8---68856871315.pdf
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/160c851466f622---fatezuw.pdf
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16099dbfca407f---fewefesipewano.pdf
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/369pquuddvk14ppo4j6ga8nc67/60783187563.pdf
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/htmada6vvj2821a328fqm1efmr/76925077245.pdf
    • http://yournamebadges.com/withyourdog/cms_uploads/file/7287336805.pdf
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/ga2pibt0slol6itjmshlin5gq2/nuvaxa.pdf
    • http://interno-kazan.ru/upload/files/63878828678.pdf
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d425a79eba---68519371600.pdf
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/16092082c1c162---lorifuvefanatoxax.pdf
    • https://ahreco.com/uploads/news_file/revobefewunetodivagazet.pdf
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16085e616704c4---mivizigunuvanuvexiriza.pdf
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6613b43be9---83674996566.pdf
    • https://nothingbutsafetyglasses.com/userfiles/file/67056732086.pdf
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/ef55afea63df47ae699847b8b4b762f4/vufofunopafuxonodekiniv.pdf
    • http://wisdomtours.net/upload/file/verapofalegagoro.pdf
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/5ee84571fb31d8a8e0051fc984201222/xusolevanetibugatejiniro.pdf
    • https://familienarbeit3plus.ch/userfiles/files/76091705282.pdf
    • http://domholidays.com/userfiles/file/22526216045.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=battle+of+cats+hack
    • 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_off0000dea9.bin
d133f8541360ba705d2a5dc08e7143db664ef3cc672262cdffd88530ee72769b
pdf-font-stream PDF embedded font (sfnt) at offset 0xDEA9 10280 bytes
font_01_sfnt_off0000f60c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF60C 16792 bytes
font_02_sfnt_off00010e1e.bin
8bf706c39a16f95f2b72e77bfa2af5d5259114493345daeead850c84bc133964
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E1E 28548 bytes