Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a0584cac846dc57…

MALICIOUS

PDF

86.1 KB Created: 2021-07-09 18:53:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 77f4f843468d556535b905cbfd7be394 SHA-1: 03d4f0bf780a88dd87547592974524a7a6d53e18 SHA-256: 2a0584cac846dc5746ee7ba29a2aee87a708c2b9f38028d3b8b7d54ab0ea39ae
196 Risk Score

Malware Insights

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

This PDF document is identified as malicious by ClamAV and a machine learning classifier. It functions as a link farm, directing users to various URLs, one of which is a lure for installing browser extensions or updates. The presence of numerous links on compromised WordPress sites and disposable hosting suggests an attempt to distribute malware or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://pixomot.ru/uplcv?utm_term=internet+download+manager+6.25+extension+for+chrome
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc68d0c219---56121140259.pdf
    • https://aadhaarretail.com/administrator/imagetemp/file/48877697837.pdf
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ab001b58c28---liwuli.pdf
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16085e45829ca8---84260506184.pdf
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c89e6a82e7e---91715261976.pdf
    • https://diedacorporation.net/freesiafiles/file/xezovasaforev.pdf
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e47400f7ce---xatileg.pdf
    • https://doluhosting.com/calisma2/files/uploads/71454733070.pdf
    • http://agama-rc.com/upload/files/15945894278.pdf
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/d30a09848910eeca857107fc80365da3/88827144210.pdf
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/3e6dd347ca2d82410188bf6186c97f97/tibopususamuweduwe.pdf
    • https://club-sports.net/uploads/products/files/29990488633.pdf
    • http://techbico.vn/uploads/image/files/12334240198.pdf
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/a06bcbdf9b91713a4831494f113bff14/11971248350.pdf
    • http://lotusromeo.fr/app/webroot/files/userfiles/files/mezaburujizowavosu.pdf
    • https://forumhrdbekasi.com/webroot/userfiles/files/90199718657.pdf
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607b67af22d37---34389559205.pdf
    • https://dacinsara.ro/fckfiles/file/69897802346.pdf
    • http://boisehighclassof1965.com/clients/879780/File/detufupoferak.pdf
    • http://nedirajtebosnu.net/userfiles/file/6813265105.pdf
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/95bdde76785f7d01dbc2e04d63623ea5/59439376296.pdf
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/b28f176084bca6d179f578c420dadc05/netuvovotufunemu.pdf
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/c9ce8b0b4b65c7257b7a059a9f2306fc/bewekasas.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_off0000eaee.bin
22d2d8ce5d866159efdc7980d7486945ba531f70798a588327b6274cb9cf7fbc
pdf-font-stream PDF embedded font (sfnt) at offset 0xEAEE 17008 bytes
font_01_sfnt_off0001172b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1172B 16792 bytes
font_02_sfnt_off00012f42.bin
7507436217467358a85cbcf0890a830dd55ab7c37bfc8630c8a2d5e237021042
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F42 11552 bytes