Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c12e5331f68da41…

MALICIOUS

PDF

95.7 KB Created: 2021-07-31 17:48:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e7b1d0f1a94b8a5f3a1677d79f87e8ef SHA-1: 443c7e67a6106f2c7ebcaa0f7a0f9ee0fa8bf2e9 SHA-256: 1c12e5331f68da417323716c7f7e153d09dc7a6d198b176b40e95911d9edf9c3
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting domains. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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 http://rocincorporated.com/domain.com/images/dynamic_pages/file/dusonuzetexa.pdf
    • http://humanlitech.com/files/files/22664508424.pdf
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/hdo6iggrchmgdr64fgcl1is2ao/genowakan.pdf
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/fa4q26habotr1p2edlas77esia/guwopigedev.pdf
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/5a8a98124acc4a4b368cf9fa33e10311/16817518093.pdf
    • http://musicupclose.com/clients/f/f7/f7c291dfb329fbc33054893077acf627/File/48490382619.pdf
    • http://sskj.pl/userfiles/file/gakexigax.pdf
    • http://adance0112.com/upfile/editor/file/derinezedesirewuwidupupaw.pdf
    • http://zhhyhb.com/uploadfiles/files/14649632059.pdf
    • http://angelescare.com/userfiles/file/77411102319.pdf
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16080e075a42da---3705266295.pdf
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/2s2conbqmp48gumhfncfjd0p57/repezopemumibi.pdf
    • http://akinmedikal.com/uploads/file/kiwezesikako.pdf
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/qi6mdntc9vhi1d72ulrg6kpm3f/zibojaguvetipiwejexemi.pdf
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160823b0688f9a---10868793082.pdf
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b1499085831---gagonubixofikiditikofipo.pdf
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/c5bf4a3bc000221be7db9509d5ec0d24/wuzopororobagoma.pdf
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8834ac5430---79947187489.pdf
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/pp7jrnfknqikfr4oqm7emga65q/gifodadilolobe.pdf
    • http://wignaccent.com/FCKeditor_2.6.3/userimages/file/20210713225559.pdf
    • http://agisma.ru/files/pages/files/86663647704.pdf
    • http://thegioituigiay.net/uploads/files/61021366858.pdf
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607b1309508cc---17866203938.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=quick+start+guide+for+amazon+fire+stick
    • 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_off00011207.bin
143dae489779eed4965c8641754249130a8bc280e1b364580bab24a09fe90041
pdf-font-stream PDF embedded font (sfnt) at offset 0x11207 11084 bytes
font_01_sfnt_off00012bd9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12BD9 16792 bytes
font_02_sfnt_off000143eb.bin
50c81a8a20b9d3addd8b784c9a112c6d8c6aa9065e47fc68eec5939a20e36f04
pdf-font-stream PDF embedded font (sfnt) at offset 0x143EB 17148 bytes