Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c2ec99278b32f18…

MALICIOUS

PDF

93.7 KB Created: 2021-07-02 11:47:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d8a96de94a01543337f3dc90e4f6c548 SHA-1: 1626501564099fa0806552b1f8c964e71ac777a4 SHA-256: 5c2ec99278b32f1851ca466eb31d0ad5d378c52ba1a52daa985d4f97004c82a1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm or phishing lure. The presence of embedded URLs and the nature of the heuristics indicate the PDF is likely used to redirect users to malicious sites, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9786

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://nomylo.ru/uplcv?utm_term=romance+of+tiger+and+rose
    • http://kondicionery-vidnoe.ru/upload_picture/file/pisoritifevuj.pdf
    • http://acmemask.com/upfiles/editor/files/51109366661.pdf
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1609f15e2b2745---zanetobuwumuguxiri.pdf
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160ac4d27aba5c---vogesarekofakoweg.pdf
    • https://cochleartudaskozpont.hu/files/kejiritibiposiwukimoj.pdf
    • http://zoncmswebsitebeheer.nl/files/editor/file/11397101127.pdf
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/b64a41d8a4a5118850fa4c4a0f6a0f5c/wodokidenezafozaj.pdf
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fb91396059---wisadetiruzodakeso.pdf
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/9fea87a18690577045a1456a1b25912a/sujinijiloviluxevubivi.pdf
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/16085e1318adf2---96991238229.pdf
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/16085b8a6b113b---luxemawijibipo.pdf
    • https://gulyaskantin.hu/uploads/frontend/files/xekanipowaf.pdf
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/5249279af0ac3c4fc70ffba4e4ed73af/52358836849.pdf
    • https://felix-schulze.biz/wp-content/plugins/super-forms/uploads/php/files/g59m3a688p4hvo1jrga6i9rl5b/bojuvowijazuxizufoxapu.pdf
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb204c8c37d---pofex.pdf
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160da04231e89f---vigegok.pdf
    • http://shiokuda1.com/contents//files/62044844238.pdf
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a02a84545c1---26735103532.pdf
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/8b0830c2b656d832a0a28706bcb770f6/gedara.pdf
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/1c3099a2e83aa3ace40102678fdb5fff/35973119689.pdf
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a896356cbe9---niguwov.pdf
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b1503930ce---palexekexakepazipebej.pdf
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/dopv2dg0dc82e3a60o25lmbi5g/niraxabejejovuso.pdf
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607c841f425b7---44711838400.pdf
    • http://fygl.net/uploads/file/242356195875.pdf
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607a69446e0a0---bosugas.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbdb.bin
885db12fedea2fe0f0df86bd7b6dce9b499b392c38a5d73a8cc3bd6892a5f1d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBDB 2608 bytes
font_01_sfnt_off000106e1.bin
9f182f3c78e2684c1030626b17b11df985ab999fe4ac8182a2d4c1742cf8d7ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106E1 18932 bytes
font_02_sfnt_off000136bd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x136BD 16792 bytes
font_03_sfnt_off00014ed4.bin
9b1b89dfaa2204ad5db0f3738ff1218077b9d83cc290cc3cfa384e2e95b7321e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14ED4 10820 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.