Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7459c8b646ffa54…

MALICIOUS

PDF

88.7 KB Created: 2021-06-27 06:27:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4348232a8a71ded36938d7128576b39b SHA-1: 11a125f47ac9b8de139dba4b6518afd261d1efd4 SHA-256: f7459c8b646ffa54e3ce9b18fdaa1730a1c1af973845c26193637318b57eb80c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a phishing or trojan distribution attempt. It functions as a link farm, containing numerous URLs that point to potentially compromised websites or disposable hosting, likely intended to lure users to malicious content. The presence of external URIs and link farm heuristics strongly suggests a phishing or malware delivery vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://oniceh.ru/uplcv?utm_term=cancun+to+tulum+taxi+cost
    • http://rajeshjshahani.com/clients/d/de/defaee86e9f1fedea086b53a5072ac2c/File/jinoforirodevodananur.pdf
    • https://ngoctraithaibinhduong.com/uploads/news_file/11277748521.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/s1hjtcq5dh67u2i1cunisp0273/nisovisivofilopovip.pdf
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/b8b4df44281308b7c934d6ae3a02e756/70210496324.pdf
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/896510e043a2f15827016b562ad9c0d9/keleremi.pdf
    • http://aptchasers.com/FCKeditor/userfiles/file/kezutumeper.pdf
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/konuwugodetudupi.pdf
    • http://sunarfactory.com/userfiles/files/nasosutejaxezok.pdf
    • https://medtek.vn/storage/file/xezar.pdf
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/0685016726d1b6bdec9a362cdc32a9ea/maxuta.pdf
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16081bd7594bc0---43751583352.pdf
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160a7b69e34174---15807465254.pdf
    • http://rokakisreunion.com/clients/a/a8/a85ca1e4cfc2bb88d767af442173b437/File/91833956031.pdf
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9087a80ba0---15202471518.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081831a2b7b6---segilimulolebewi.pdf
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/at900jau5p46nn9euqi10hlmd6/nugeditelevelalinanorida.pdf
    • https://medicabg.com/uploads/wysiwyg/files/68609367525.pdf
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e120ec907a---vabigaxukawijusixa.pdf
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608ca192e0edd---88309403900.pdf
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cd41fe66065---96158273602.pdf
    • http://clinicoral.com/img/userfiles/files/pabamukujig.pdf
    • https://fotojursa.cz/userfiles/file/75741330331.pdf
    • http://polloricowings.com/uploads/files/56351501673.pdf
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/jh2m98u2grcn9f0h5i91lklh75/61184552506.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_off0000f6a5.bin
952ec738fb756e6b9a3b9c3d479eb9e439143e01d484deaf78da961c58159adb
pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A5 10392 bytes
font_01_sfnt_off00010e32.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E32 16792 bytes
font_02_sfnt_off00012644.bin
6d0d9711477e1e030dc56926c38021c0b5c8b3a3add50053d9ec047212cfa32f
pdf-font-stream PDF embedded font (sfnt) at offset 0x12644 17512 bytes