Malicious PDF — malware analysis report

Static analysis result for SHA-256 0143666564de5656…

MALICIOUS

PDF

90.1 KB Created: 2021-07-07 15:34:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 49b8af6c227fc117d2a131dc8cadb758 SHA-1: 5c04acd8fc13db978c8a888c5a1d7907fb27f938 SHA-256: 0143666564de56567649b0c47cd44d2b2ea631fd2a51d91a47c25d241faffc41
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to various domains, many of which appear to be compromised or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were extracted, the structure and URL patterns are consistent with a link farm designed to lead users to malicious content.

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://medvor.ru/uplcv?utm_term=black+moon+lilith+chart
    • https://ebooksweb.net/files/file/jekodexulasamewefikarol.pdf
    • http://westtech1963.com/clients/d/d4/d4250bc21dcbbf02d7f9bc68df143add/File/31850871447.pdf
    • http://a-swiss.com/upload/userfiles/file/bikagenonewipivegujot.pdf
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070f0691ceb4---50630568944.pdf
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160982e118e5ee---terovofebufanuzuputoworo.pdf
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/gp21phloe5ul3bkpq08c9j9vlg/zodepalexuvizaka.pdf
    • https://chetanaus.org/bheru/uploadfiles/file/palubivofesibisu.pdf
    • http://xn----8sbaqfskngn1qi.xn--p1ai/userfiles/file/wuripawatabetogulelefume.pdf
    • https://burgas-remonti.com/userfiles/file/mopamepafugojidorapelova.pdf
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/16092cdf3eca4e---33376726637.pdf
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dc94cd93ec---82365939478.pdf
    • https://lexconsulting.ro/webroot/files/media/zupugo.pdf
    • http://aldercrest.com/files/xitupetojewejiwa.pdf
    • http://toddfamilyreunion.com/clients/4/48/482e924d5a052aa4a0c13eb8a30e0bc8/File/92270207330.pdf
    • https://ludifrance.fr/userfiles/file/45344034501.pdf
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16074152e08791---24390632212.pdf
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/5faf64c609e021ac32624a0456c7f6bc/79107130041.pdf
    • https://akonis.ch/userfiles/files/25743782160.pdf
    • http://scales-center.com/shop/fck_file/file/51672679656.pdf
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609edabd56531---89598915751.pdf
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160718f130c54d---bujipufuba.pdf
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/78a60d8cc1749274fab41750f431228b/26165870151.pdf
    • http://noithatsah.com/webroot/img/files/50559345055.pdf
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d2806e003d---2280130130.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_off0000ff03.bin
1a009db691c62db25987977f976e49888195a56782fc25cbe3ac9e9ef065f2fa
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF03 17340 bytes
font_01_sfnt_off00012c4a.bin
c6bb8b60ca1546f2bb92d0fd489b835881e2f7309938110d8f86a16ac83e73d5
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C4A 10340 bytes
font_02_sfnt_off00014367.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14367 16792 bytes