Malicious PDF — malware analysis report

Static analysis result for SHA-256 7da9ee5534ec86a9…

MALICIOUS

PDF

95.9 KB Created: 2021-08-10 18:20:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 0126db47e069e8bfd1775280ec74d2ba SHA-1: 18cabea10c4bfe1a4e6127d24a2e0c6dc5dcb704 SHA-256: 7da9ee5534ec86a9cab5526d6f97116ed706b827aa0452156d661aefea2d0376
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that redirect to compromised WordPress sites and other domains, likely serving as a distribution point for malware or phishing content. The presence of multiple external URIs and link farm heuristics strongly suggests an attempt to lure users to malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9923

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://drafthe.ru/uplcv?utm_term=beach+buggy+blitz+hack+apk+download PDF link annotation
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160bbc035500a3---fixutopetesitesejos.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/637266dc1c8e38ea3cf36c2301b853e6/sasirizafididajazopexoba.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/1306551d835e73faa66293dd185398cf/gitonodapunolepar.pdfIn PDF document text
    • http://metallpress.ru/files/zeraxabatefuzipudusepeb.pdfIn PDF document text
    • https://bhsbeacon.com/FCKeditor/file/kuwezevefosowovako.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2ac1b77e81---48055002441.pdfIn PDF document text
    • https://www.delaneyllc.com/ckfinder/userfiles/files/14897412421.pdfIn PDF document text
    • https://n-v-v.dk/userfiles/file/7294043203.pdfIn PDF document text
    • https://emmaushuis.org/pages/wisidinaginimijek.pdfIn PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/0bade8802a71abd00ef688416fa9a58c/witesobesi.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16071a9b976b8f---32106342136.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607ad8fdec315---begajunasatosusopebup.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/160fb66465f85c---85695303571.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/df6a9b08d3c5c94166d47e56ba9f8fb1/18958984678.pdfIn PDF document text
    • http://prestopc.it/upload/file/tavirinofe.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/cc7bf54b21d4f74c9d638e884a6c5b32/85298264025.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610cc6581d898---sasusoninulusanekimira.pdfIn PDF document text
    • http://www.niziointerior.pl/upload/file/povelifelulifisamutof.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/ef004691d1177d219a1b646c089616bf/52710212591.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/e3ecfd164174fd3eaf8a06879070de9b/62762631887.pdfIn PDF document text
    • https://samngaimarble.com/html_upload/file/94220313188.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/1ed0519ab2fc2be5ba1ffb832afc3310/20379679220.pdfIn PDF document text
    • http://acsalma.hu/userfiles/files/13405723452.pdfIn PDF document text
    • https://genegurumiraclehealer.com/userfiles/file/lexajalamodavosut.pdfIn PDF document text
    • http://londonjip.com/userData/board/file/62623325651.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fdc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000115e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115E0 11168 bytes
SHA-256: 3826330e8f99e0fd5dbc167052de210b8c2a7c44409c72bc8d336a06e500b74d
font_02_sfnt_off00012f9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F9B 16092 bytes
SHA-256: 9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd
font_03_sfnt_off000144dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144DC 17196 bytes
SHA-256: 3c43871616ebd348cf1c047c23a9901d6bb6a6d2c970c47ab627f18fb137cd6d

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