Malicious PDF — malware analysis report

Static analysis result for SHA-256 6825730aec82cef2…

MALICIOUS

PDF

86.3 KB Created: 2021-07-06 20:15:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4b9ea1b2a95129b9896742b377509468 SHA-1: 789849ef3eea4d4fae693c9596fa7c3177ed54ff SHA-256: 6825730aec82cef25b0cade0b18615b0f9e3d9c54839d4d654826f6d9962ea35
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure strongly indicate a phishing or malware distribution attempt.

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://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/4dn6rnjh1r377q6trfb574ncb6/75175227093.pdf
    • http://creative-format.com/upload/editor/files/juwulo.pdf
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160983eaa07310---vipetovugesanabifi.pdf
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160be77c398ce7---sifuxevawa.pdf
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d4fd0edd4c---28443920592.pdf
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160845d8434292---nofefaxafujaxazineliwo.pdf
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b1e2c9fc44---2235418316.pdf
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607d7d8f7da1f---86463909343.pdf
    • https://churchofgodinjamaica.org/app/webroot/files/79145739570.pdf
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/8f21bc0ea70650e682e8c47c8bedc574/lafigirivifosidisasoruk.pdf
    • http://paletydozahrady.cz/ckfinder/userfiles/files/gobazi.pdf
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/16075989dcffb7---46342183904.pdf
    • http://sllight.ru/design/img/upload/file/3609992893.pdf
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c93eb216ff2---48497934137.pdf
    • http://abc-tel.ru/data/File/71677960837.pdf
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/ed8f33b8033d102155dccf7565b53467/33323944415.pdf
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/5d7a7e598a50a6a7ad6a00177a3873c3/54639895872.pdf
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608d604667ac5---78264947269.pdf
    • http://conblocmanado.com/pics/file/samatovazis.pdf
    • https://securitegenerale.tn/userfiles/file/24204691251.pdf
    • https://muratay.nl/userfiles/file/doromiku.pdf
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/1357643df7801f9a8bf6897aaf47e58f/41900142973.pdf
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/h0t6upce6m3998mjh7ldgvq39r/490800443.pdf
    • http://519pf.com/userfiles/files/pobotaziv.pdf
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607db19a2961d---figozobefizugewafedosewe.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=lab+ionic+and+covalent+bonds+assignment+lab+report
    • 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_off0000ede7.bin
a636312080d4bcaea97a7f0282fce4058e5aa54cbdc4a29042c2d80e6ca9b6e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE7 11020 bytes
font_01_sfnt_off00010721.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10721 16792 bytes
font_02_sfnt_off00011f33.bin
70b357dd5f5349e40a42c90e400391415f84cfad220d78116043883a9ff0c7a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F33 17040 bytes

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