Malicious PDF — malware analysis report

Static analysis result for SHA-256 00d66f027d231aa9…

MALICIOUS

PDF

72.0 KB Created: 2021-07-02 13:19:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c5f6c2f3e735ac5851afd976f2436da0 SHA-1: 141ac34c5a6b6dc3beebd0005a64e40b91e91bb0 SHA-256: 00d66f027d231aa9d735bc4f0a314b067851cff61e0810040fb7e91946b42bda
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate the document functions as a link farm, pointing to numerous URLs hosted on compromised CMS uploads and disposable domains. These links are likely intended to redirect users to phishing sites or download further malicious content.

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://careersourceokaloosawalton.com/files/public/64428623158.pdf
    • http://files.ibiza-ferien.de/file/94937527870.pdf
    • http://internationalnetworksolutions.net/files/
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/14555po0pi17qio57e00kca6d5/tidibuperisatesabisejurin.pdf
    • https://cuisinescartier.ca/upload/editor/file/44804032007.pdf
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/bss6f08r9gnbhe80s2fil49ok5/malig.pdf
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160af9cf179849---lonunubaganodebifa.pdf
    • https://tailormade-sales-marketing.com/userfiles/file/46030864522.pdf
    • https://diphong.com/uploads/jufizuzu.pdf
    • https://laughteronlineuniversity.com/images/upload/files/23184050394.pdf
    • http://ehomeforeclosure.org/images/file/77759650554.pdf
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16083cd1203319---xirurizik.pdf
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/7etba0s7agfuhjbvoo7g3755pf/37611741072.pdf
    • http://mppscstudy.com/admin/usercontent/file/togadizaluko.pdf
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/0k2tmcscntnrse33lnmp2l2cdl/40945756687.pdf
    • http://crystalsteakandstogie.com/clients/1/1d/1dbb6d5698303b6304ae84622e226a19/File/gakanevumedagofiw.pdf
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/6ceb9aa16195a87ef655398e99835b29/fulogi.pdf
    • http://ballstonfamilymedicine.com/clients/861402/File/wanalanomulam.pdf
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16071d284e73eb---12464498150.pdf
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/d7vbr4cf26oru8itbkno5i7cvh/tajodovufizepow.pdf
    • https://www.tanyadantus.com/wp-content/plugins/super-forms/uploads/php/files/9b36d274d98aa4c8255c08e68c5dc492/9658181277.pdf
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/9mkvaivj9pe6l2sppori1t1dp1/24644594171.pdf
    • https://telewebmarketing.com/FCKeditor/file/nujigamamuf.pdf
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/e0a1ac94b9e049636bd930b97cada98a/66065821566.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=dhoni+hd+images
    • 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_off0000b93b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xB93B 16792 bytes
font_01_sfnt_off0000d14d.bin
faddfc1c3eb4da28e5eee22dafc1d262ab2f6b3a7bf1bcc27877602fa51097a2
pdf-font-stream PDF embedded font (sfnt) at offset 0xD14D 16316 bytes
font_02_sfnt_off0000fbbc.bin
f8ac87efaf1569c040cca3540f2caaf66e89c1a80e38766cfcc7218c6ad7b8b5
pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBC 10452 bytes