Malicious PDF — malware analysis report

Static analysis result for SHA-256 e49d5d952d537a8c…

MALICIOUS

PDF

107.4 KB Created: 2021-06-25 17:49:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d60765825e53a87f4bad66cefc1fca20 SHA-1: 4cfddb1cc3784e8519974e32e1bfee1d6586301d SHA-256: e49d5d952d537a8c2b3ab35b7927d659f25a30b3dfdc7c618cc1dc60171d2a51
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress sites and potentially disposable hosting. The document body is unreadable, but the presence of embedded URLs and the link farm structure strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://atolab.it/wp-content/plugins/super-forms/uploads/php/files/f7270134de146b1859e4d3aab3852b27/dofuvomofimavenizunesude.pdf
    • https://prospr.fr/ckfinder/userfiles/files/gapabenogetenegiguzejusij.pdf
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608debcdf0daf---wekebekuwararomufe.pdf
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160746c8457623---fitufofuxudapusul.pdf
    • http://okuninka-biale.pl/userfiles/file/biluzuvekite.pdf
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/99c5554e9b8a24b35d8d56d43e480b60/watiteti.pdf
    • http://tpdw.pl/userfiles/file/18144531773.pdf
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609de58c2f973---vegosobenaxera.pdf
    • http://sahrugs.com/userfiles/file/38015138780.pdf
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2078cd8a2f---9874563853.pdf
    • http://kanchanaspa.com/ckfinder/userfiles/files/negifidelexuwiluxu.pdf
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/e4mfsgmo78ht0s4liim97f66l4/99181719726.pdf
    • http://uss100.com/clients/5/56/562308f4da1da23328cfd9e5c9f3e68f/File/94979554064.pdf
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/hvcp7s6mgfdbseepl81gtie2b3/9493120035.pdf
    • http://gw73patriots.com/clients/1/1e/1ed986c9d410becccfd9995a8318e329/File/45029659808.pdf
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a8d572d6dac---pewosivuxixo.pdf
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4fdf18735---ravirufad.pdf
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099d3de9c5bc---3561489178.pdf
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607b540bebec9---56802210818.pdf
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1607cfcd15b3c3---tuwede.pdf
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/a73e27e1b2709edf9005df426a7d85ca/wopar.pdf
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c63b840d8db---85115728114.pdf
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/db93ac232535cca6d3bb6408317f559c/wadarevijogokuxeruw.pdf
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607747b7e4dc3---78255849062.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=new+media+an+introduction+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_off000143aa.bin
c80bf61d4b924fc4fe1c9650bdebad3d5bca7d3df590ec72c1ad0b8834485bf9
pdf-font-stream PDF embedded font (sfnt) at offset 0x143AA 10728 bytes
font_01_sfnt_off00015c56.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x15C56 16792 bytes
font_02_sfnt_off00017468.bin
65293ca9ce810f3eeb434738a7f9fa75f6d285b3c295f81378d9944b4e44d481
pdf-font-stream PDF embedded font (sfnt) at offset 0x17468 16908 bytes