Malicious PDF — malware analysis report

Static analysis result for SHA-256 468b82543947c738…

MALICIOUS

PDF

177.9 KB Created: 2021-07-06 00:26:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 09dc53bdab6f3c6d70c51b0f1f292411 SHA-1: 8d52dc9f6824dcc9a45029a6024f013dd691a02e SHA-256: 468b82543947c7388663163d4429ffd08123fca81f0ac563e9d9ac39c9128ea7
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external sites, many hosted on compromised CMS platforms, suggesting a link farm or phishing lure. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely provides instructions to decrypt a password-protected archive, a common tactic to evade gateway scanning. While no scripts were directly extracted, the ML classifier and ClamAV detection strongly suggest malicious intent, likely related to delivering a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9715

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://curry-box-deluxe.de/userfiles/file/jonudokosoxutipupa.pdf
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/27c6366483c2033ab355bc3013478d35/wuzosuxavekuxim.pdf
    • https://almoheetmanpower.com/public_html/userfiles/file/bijuziza.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab7e1848b54---62809232540.pdf
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608836d4899a5---9392866124.pdf
    • http://tajeer.co/userfiles/file/31127872272.pdf
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/613981cb5e4ffb979821304a227af473/74010670077.pdf
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/20db59fjc6d7usj8opaofp4pmv/73302984038.pdf
    • https://llibreriaha.com/img/events/file/11255294973.pdf
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16085f4b995dff---21657504029.pdf
    • http://rkmaster.ru/uploads/files/27673964515.pdf
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/dc23f751122b52b8fd02ba3f46fa5d30/tivubotozabe.pdf
    • http://augustaelectricalwork.com/editorData/file/73299950029.pdf
    • https://jordan.si/dokumenti/file/sekedenamipijiwazejodog.pdf
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/6a731417c8b33e4e4d8363447d49b086/67027999662.pdf
    • http://www.huntsvillepr.com/files/files/xagepuxagejaf.pdf
    • https://seitonsolutions.com/ci/files/sonovev.pdf
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a3760532e69---85458878538.pdf
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/68f23694fcb7669a3614d4ccac6f57a5/18740053002.pdf
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/1e2036e55c899a13cd0718d3356356fd/wisodeduxojimarokujip.pdf
    • https://bookatowncar.com/userfiles/file/40940907956.pdf
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/41b8ad378a4321facdfcb522189471bb/ruwuzumi.pdf
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/j0s4mtrmqro5ot3k59h621rj1f/93107607683.pdf
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160d6fd1ee3b81---25041224130.pdf
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d59d3e02a6e---xunuwakisimaxitafawutir.pdf
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/74893b1770ad215472e67e7462d2cd30/45182695756.pdf
    • https://bnbtravels.com/ckfinder/userfiles/files/74746911127.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=creature+3d+movie+download+hd+1080p
    • 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_off0002519a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2519A 16792 bytes
font_01_sfnt_off000269ac.bin
b916ba71ec4f1d09d2c3ab2665420d21fc103b3a5561739d9974ade8dac8dc37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x269AC 19564 bytes
font_02_sfnt_off00029d32.bin
c3616a0ecf5a9ea907ec12c73731ccc8bb4dd64d1d23ec3d7d63781b8a3b85ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x29D32 11328 bytes

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