Malicious PDF — malware analysis report

Static analysis result for SHA-256 c47e3bc460543d61…

MALICIOUS

PDF

88.1 KB Created: 2021-07-04 21:10:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e0b3f0b81fe6ca005071fe925da5e37e SHA-1: 35064f5484dd44aaa47ae9e918c8dafa4edbca32 SHA-256: c47e3bc460543d613c9162ee52b78cdc7029e327347442231fc58bbdd22d9a77
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan distribution attempt. It functions as a link farm, containing numerous URLs that point to other PDF files hosted on various websites, some of which appear to be compromised. The presence of multiple external URIs and link farm heuristics suggests an effort to obscure the ultimate destination and potentially distribute malware or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/e00461f8c071091266ca19aa14d5b572/verimiked.pdf
    • https://ev-owners.jp/userfiles//files/naxiwunuxojiw.pdf
    • https://tecnicadovolante.com/images/file/92136853050.pdf
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ebc485f750---65155482943.pdf
    • http://alhouti.com/userfiles/file/vilabomodo.pdf
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b0283a70f1---31187861990.pdf
    • http://cdmatik.com/uploads/file/bonepugobakomulizoxuvez.pdf
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/g8juimmccujm9g9arsg7n21qc1/loxaw.pdf
    • https://alarrabnews.com/images/content/content/file/12950807051.pdf
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ed38482166---13995659454.pdf
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/b6f85e03fdd870277e709b0c9fb8b9da/65117127814.pdf
    • https://protectname.xyz/whoisprivacy/userfiles/files/90281862941.pdf
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/fdd4b91038ad7cbfb0ae6b97601ae849/75278052995.pdf
    • https://avenue102.com/uploads/file/sapuxaxunibupova.pdf
    • http://englishkan.net/UserFiles/File/68013565574.pdf
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac30d01a2b7---99848463471.pdf
    • https://marljivo.hr/userfiles/file/95493207277.pdf
    • http://posekatzahradu.cz/files/file/vulesatorebilasukij.pdf
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16085af2f347f5---sejatuzarirozenipi.pdf
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a7cf74dbadc---zavebolepiwi.pdf
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/39bcc2331147abcccb7c0237562153d7/75068486487.pdf
    • https://healthmatters.me/userfiles/file/38209750665.pdf
    • http://alexlunacoach.com/img/editor/file/35270710670.pdf
    • http://xn--49s538bo8ux8c.net/userfiles/file/49400281470.pdf
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/kvo6h77v8q3vp03t69vm76rpoj/44667957791.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=addition+and+condensation+polymerization
    • 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_off0000f276.bin
870c51842f6e0f28a02ff41872e959d893d79da92de363bee1279b140cc08998
pdf-font-stream PDF embedded font (sfnt) at offset 0xF276 18056 bytes
font_01_sfnt_off000121e0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x121E0 16792 bytes
font_02_sfnt_off000139f7.bin
40fd58c0cb1be44c99d34670cd58374ab1beb496e7332ed7c45946886799ec1f
pdf-font-stream PDF embedded font (sfnt) at offset 0x139F7 10832 bytes