Malicious PDF — malware analysis report

Static analysis result for SHA-256 254ba47d62e874fe…

MALICIOUS

PDF

82.2 KB Created: 2021-09-18 19:28:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 1c1a726054b8844cfd7bfccb95db5a5e SHA-1: bbc8f92bdc128877115bd8dcf4c5c87a1164484d SHA-256: 254ba47d62e874fead15572066ba18977327bfd752248fa39f2eda1ca171325d
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external URIs pointing to disposable hosting, suggesting it functions as a downloader or phishing lure. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a link farm designed for SEO manipulation or traffic redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://smidgel.ru/uplcv?utm_term=normal+golf+club+lofts PDF link annotation
    • http://101-games.ru/images/uploads/files/92842198645.pdfIn PDF document text
    • http://torgoborud.org/images/file/tobuweribusutizogekime.pdfIn PDF document text
    • http://machi-tomo.xyz/js/ckfinder/userfiles/files/23389196621.pdfIn PDF document text
    • http://kcntanduc.vn/img_duhoc/files/63791372339.pdfIn PDF document text
    • http://johnmichaelharrisonlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tokinivon.pdfIn PDF document text
    • http://moderncarrent.com/user_img/files/27381698354.pdfIn PDF document text
    • https://ilexgold.com/app/webroot/files/userfiles/files/7697755139.pdfIn PDF document text
    • http://jagodkaprzedszkole.pl/userfiles/file/32127036267.pdfIn PDF document text
    • http://maslatalaia.com/userfiles/file/jugefe.pdfIn PDF document text
    • http://rebornfair.com/FileData/ckfinder/files/20210908_7A05B45322F48539.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/b7e08a533ebe603745e828259e7bb598/44289837271.pdfIn PDF document text
    • http://domgr11.ru/uploads/files/depokudajajefizuwateno.pdfIn PDF document text
    • http://all-premium.com/user_file/files/74615805299.pdfIn PDF document text
    • http://www.c-l-r-p.com/admin/ckfinder/userfiles/files/pujulosifoxomesex.pdfIn PDF document text
    • http://bjhtdszdh.com/v15/Upload/file/20219121022391108.pdfIn PDF document text
    • http://embody.box8websites.com/ckfinder/userfiles/files/37907468500.pdfIn PDF document text
    • https://meganimal.pt/site/upload/file/degezibelukopadojijuv.pdfIn PDF document text
    • https://basalyemek.com/ckfinder/userfiles/files/xefupuxogefafinesesoxuvo.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/b244313cfcd29f6256a211a0a0426f1a/tavuwafusumevinerateza.pdfIn PDF document text
    • http://osteriailgalloelinnamorata.com/userfiles/files/96554023730.pdfIn PDF document text
    • http://rallyteamwalraven.nl/file/49193567075.pdfIn PDF document text
    • http://giorgimpianti.com/userfiles/file/kawopupusasijuviviretova.pdfIn PDF document text
    • http://hyosangjo.com/userfiles/file/20210903095730.pdfIn PDF document text
    • https://www.peltonfell.org.uk/ckfinder/userfiles/files/pikewugi.pdfIn PDF document text
    • 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_off0000de6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE6C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f67e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF67E 17192 bytes
SHA-256: fc629f29a41b54b1b1337f36672115af7a444629d5b83a38a7b96095b33f1d82
font_02_sfnt_off000122bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122BB 10568 bytes
SHA-256: 68ba8b5d9109a693096b212bc7ca522686397bd84d4c8c175ec17b32cad2cf71