Malicious PDF — malware analysis report

Static analysis result for SHA-256 aef8fb0d744a323d…

MALICIOUS

PDF

84.9 KB Created: 2021-08-20 07:31:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2320639782bcc656585ba0116f793a3b SHA-1: f089b89c5c011806843b49d2ef14c05cc559ff9c SHA-256: aef8fb0d744a323de54e6936ae02f5c08e88333a536d5940bc725f6c90e4aec8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to compromised WordPress uploads and other disposable hosting sites, likely for phishing or malware distribution. The embedded URLs, such as 'https://huntic.ru/uplcv?utm_term=samsung+galaxy+tablet+8+inch+cover', are designed to trick users into clicking through to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://huntic.ru/uplcv?utm_term=samsung+galaxy+tablet+8+inch+cover PDF link annotation
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d2cb0b7198---65675487105.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608886b2525b2---vagojipasafagaz.pdfIn PDF document text
    • https://tl-systems.hu/files/files/domepiveridaji.pdfIn PDF document text
    • http://hintzfamilyreunion.com/clients/1/12/12a2788c5de59b93c87e4eff35998d4f/File/pepinasonewitugivof.pdfIn PDF document text
    • http://kimhoatra.com/upload/fckimagesfile/8068811289.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc4b0ef2db---putewageburodukejuk.pdfIn PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/8oulqhmh5gm84pt9fl5gjumfvj/28037062767.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/2a4g1s2lc49knl372jpm6n77o4/97274855011.pdfIn PDF document text
    • https://gamedunyasi.com/calisma2/files/uploads/xazesavuvogigegikesodega.pdfIn PDF document text
    • http://wittymall.com/multimedia/userfiles/file/25468942402.pdfIn PDF document text
    • http://kjphotocon.org/data/userfiles/files/2878844753.pdfIn PDF document text
    • https://marbeyoyun.com/calisma2/files/uploads/87881150469.pdfIn PDF document text
    • http://wisdomtours.net/upload/file/mogokonosupo.pdfIn PDF document text
    • http://novosib-sport.ru/ckfinder/userfiles/files/27638026322.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160868cd74c77a---komijobamuzudenesugat.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/14804141619.pdfIn PDF document text
    • http://stepasidemedical.com/images/uploads/file/42637223454.pdfIn PDF document text
    • http://gift-founder.com/archive/upload/files/jalexiwifuz.pdfIn PDF document text
    • http://www.petercar0937494634.com/upload/img/files/12674755656.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/8a7b25a1ac6640f7e6137e9212693d7b/11944854614.pdfIn PDF document text
    • http://gift-founder.com/archive/upload/files/dodeludupasaxefa.pdfIn PDF document text
    • http://www.peretprod.ro/content-images/file/tirawewalojakakemivazap.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16071a7c2bfaea---bidalimijokepirelerupaf.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/bfb139015601df5aff4d6ef3d38f32d1/fefukex.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_off0000e684.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE684 16940 bytes
SHA-256: e89b02d0625183050998fcc04b3c3080c469b2a2040f725caa57a4cd4e68cfe4
font_01_sfnt_off000112a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012aba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ABA 11484 bytes
SHA-256: 1817fe69ef300c27371705363c55f3f20de6358834d593004b13596068f13ecf

Open this report in the interactive analyzer, or submit your own file for analysis.