Malicious PDF — malware analysis report

Static analysis result for SHA-256 69f7bdc59d105bff…

MALICIOUS

PDF

86.6 KB Created: 2021-07-12 16:30:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3c53ffa620281c6509d33e9ac0f1cc87 SHA-1: 8b2b86f6063f87d7d435330b7ecda60aee0cce29 SHA-256: 69f7bdc59d105bff554e4dae893eae99f002a6348ac4b43de1478d35bfc4467f
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous URLs that likely lead to phishing pages or further malware downloads. The presence of external URI links and compromised CMS upload links suggests an attempt to distribute malicious content or redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://smidgel.ru/uplcv?utm_term=six+letter+words+that+begin+with+c
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/2f4b9e40788613ac867f23ccf90576e7/kolago.pdf
    • http://www.darvidproperty.com/news/file/fodam.pdf
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/75vu6jppq26uucbt27d3okblj3/xewesutefazu.pdf
    • http://zoltysnieg.pl/pliki_wyswig/files/1789143496.pdf
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/9a11726f3c49598696f6fac2fe80fb16/34188519894.pdf
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160b013cff214e---63870723711.pdf
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7bb6e5b6dd---xonumigafakuxus.pdf
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160878746eeed4---rufamis.pdf
    • https://ukdirectremovals.com/wp-content/plugins/super-forms/uploads/php/files/cb5e16e559cf29a9914d259c777981ec/rabaxinomixax.pdf
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/35119f12aea89cb9628daa303dde783a/15165101410.pdf
    • http://elitvorota.ru/f/file/negateti.pdf
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/c321402cc1a61af5f204de40d4cbec4b/88203671933.pdf
    • https://theloneranger.tv/clients/loneranger/ckfinder/userfiles/files/dogunanedum.pdf
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa79c9c2e0---7357490285.pdf
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc788bba7c---zasizoj.pdf
    • https://webmenuplus.com/images/file/73590124922.pdf
    • http://pphu-joanna.pl/fckpliki/file/suridujesowug.pdf
    • https://rcvizovice.cz/ckfinder/userfiles/files/99718632572.pdf
    • http://ecogestval.com/userfiles/file/bubumija.pdf
    • https://medprobr.com.br/wp-content/plugins/super-forms/uploads/php/files/8df1796be1d88c4c00f1107d9bdb7dd8/jevujenidefisojadadav.pdf
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076a5e73e96a---sesulatazapupimixiro.pdf
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/vgkr2e0c9aj3denojdac89disa/10688043390.pdf
    • http://changrung.com/ckfinder/userfiles/files/derulusuzaxuwuri.pdf
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b01df9071c5---kiwuletaluwulofemezek.pdf
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/htk06291f430vusicsku375rfu/fapevajuzebonugew.pdf
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/98398be42d271aa344de9db5fd90debf/vatowinagawekezemotiga.pdf
    • http://amphorabeautyclub.com/campannas/file/vukafaxijotikupe.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_off0000ecab.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xECAB 16792 bytes
font_01_sfnt_off000104c2.bin
7b7f54f7761f809a3c7cda5200286bb948a7c1a442e9acbf1c7eb954a56feedd
pdf-font-stream PDF embedded font (sfnt) at offset 0x104C2 11052 bytes
font_02_sfnt_off00011e46.bin
7f826f02eaa910ee0ba66c3d66352caca0b2438da93f2026ed209f947464b4ad
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E46 17832 bytes