Malicious PDF — malware analysis report

Static analysis result for SHA-256 4abe1ff9cea1b47e…

MALICIOUS

PDF

86.0 KB Created: 2021-07-10 04:59:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 62ec1652947e1b87fa8cf69772ef534c SHA-1: a34152683ed5b939aebdd874d89642579a3a1064 SHA-256: 4abe1ff9cea1b47e35feb926b0a4641d64c1908f7193551ac95c650469e0da93
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and links to compromised WordPress uploads, indicating a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://catamma.ru/uplcv?utm_term=fire+mage+guide+mythic+plus
    • https://rcot.org/userfiles/file/sanefemoniruxi.pdf
    • https://cahayaapi1.com/contents//files/raginukolevinaraxedame.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606e0f9a5e228---mefesaj.pdf
    • http://uspeh-kursk.ru/ckfinder/userfiles/files/42594610841.pdf
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/d8c33ca48d2025c7b396c8bd44caf1b9/rerimote.pdf
    • http://tlxzkj.com/uploads/file/021929151523.pdf
    • https://elnativocoffee.com/silver/upload/files/wimewejibavoxufusugirase.pdf
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d8bd4e73871---sakigalaxazugedusomoruruj.pdf
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608793def2d33---tumodatekikixejubexaf.pdf
    • http://ymmicro.com/files/files/14127300480.pdf
    • https://pharmnet.cz/ckfiles/files/files/nupunuvodexot.pdf
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/2a44fbf01f1e9ac0ae4c5604fc6d6746/33702355520.pdf
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a33019a4546---fowifopitobanede.pdf
    • http://akinmedikal.com/uploads/file/46585698210.pdf
    • https://actorconseil.com/files/file/32545801979.pdf
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160bc7aa8573ef---73391942042.pdf
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/7441nn6qfrrooubm6qda6b9cl4/12124913835.pdf
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079eddc187cb---74858298100.pdf
    • https://daleplumbinginc.com/wp-content/plugins/super-forms/uploads/php/files/48784fe8214b731786d15216baa6f946/tatevezivekekatatutaxod.pdf
    • http://aarogyamedico.com/userfiles/file/xopijefilazopef.pdf
    • https://ksboutlet.com/file/files/dekomojewedutewa.pdf
    • https://bobecoingatlan.com/uploads/editor/file/94454383537.pdf
    • https://rinducm1.com/contents//files/lalidotilifu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea89.bin
926a975ecd9de7d8787d152b1f205d88189f1e7d52f356f1aee0b3e19a2e788b
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA89 17432 bytes
font_01_sfnt_off0001184a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1184A 16792 bytes
font_02_sfnt_off00013061.bin
d1c34d433bd7d934e5224b18793b532afc4a1cd673f2a6691ba77449c88751ef
pdf-font-stream PDF embedded font (sfnt) at offset 0x13061 10928 bytes