Malicious PDF — malware analysis report

Static analysis result for SHA-256 c48db8463f76d705…

MALICIOUS

PDF

105.9 KB Created: 2021-07-08 10:49:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e12c42e0c7094544943660559983ea7d SHA-1: fbd6ce2e3a487beb6ce0657e6cc0047f7ffdd670 SHA-256: c48db8463f76d705ba3b980c2fd8a1d5880e292b931aae52a0eab7bd52225e68
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 ML classifiers indicated a high probability of maliciousness. The document contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm designed to redirect users to malicious content. The presence of external URIs and link farm heuristics strongly indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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://garglob.ru/uplcv?utm_term=black+ops+4+zombies+chronicles+2
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1954020595---58335152593.pdf
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160b4ae25d9841---78565680040.pdf
    • http://kaies.cn/upfiles/210703031609425522frmpuo.pdf
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/d5096b2266d9468c24f8cacceae1c946/4550093187.pdf
    • http://szwygs.com/upload/55812488840.pdf
    • http://kaies.cn/upfiles/file/51090105806.pdf
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609df78a4d903---mipavoz.pdf
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a85807a73c9---37815145252.pdf
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c8944abf65e---fufekawibonuralobafumu.pdf
    • https://marljivo.hr/userfiles/file/sufedinazitika.pdf
    • http://bestbuyfromindia.com/userfiles/file/savuloxevajubobidemutum.pdf
    • https://advance-pack.com/editor_upload/file/dilokotuzopuz.pdf
    • http://energo-winstal.pl/userfiles/file/vejigumukolijoxu.pdf
    • https://guapa2.com/admin/fck/file/18501982397.pdf
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160949f513745e---vaduguxivewodemolid.pdf
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8cbb8b39ff---93455077868.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d89b319607---44958795677.pdf
    • https://echipamente-scule.ro/userfiles/file/pufarujigimuturiledumu.pdf
    • http://galeriejacqueselbaz.com/userfiles/file/migexafesabo.pdf
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606cee74c2765---32660175258.pdf
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609a2ad78bebc---30994269835.pdf
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/b8ed3012e206949c55ca59b1a90ba777/janafituvewokid.pdf
    • http://chiangmai-clean.com/user_img/files/69492049081.pdf
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/e2f8318f0d93ca7d63378de902184b49/zaxoxitiwufovunut.pdf
    • http://arcenevents.nl/site/upload/files/kidukizuwemorat.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_off000128ae.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x128AE 16792 bytes
font_01_sfnt_off000140c0.bin
ce5e14260febecb80d7d23e13d2c493e981e182aa10f68b767124e1a28bc496b
pdf-font-stream PDF embedded font (sfnt) at offset 0x140C0 24976 bytes
font_02_sfnt_off00017faf.bin
4e16419fb2170460687f23804423454c6444d1be580d90c08a3dae7379515c93
pdf-font-stream PDF embedded font (sfnt) at offset 0x17FAF 11084 bytes