Malicious PDF — malware analysis report

Static analysis result for SHA-256 c38b2358b20906bd…

MALICIOUS

PDF

87.0 KB Created: 2021-07-15 09:11:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bdb9247150c3901396eb26eaafb2de0f SHA-1: bd3ee63505d142c5b7c88eafc6365b40d2e5c067 SHA-256: c38b2358b20906bd5fb7c12980f020aff6eb5894801877d477bd3f06429fb5e6
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous external URIs and link farms, many pointing to compromised CMS upload directories, suggesting a phishing or malware distribution scheme. The presence of multiple distinct hosts and the use of UTM parameters indicate an attempt to track user engagement with malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://allytemp.ru/uplcv?utm_term=haymitch+hunger+games
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16092584b083a3---pekezazewowugesosemaz.pdf
    • http://biirbeh.mn/images/content/file/63799927239.pdf
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/fc20a4df868d04eb6f106e04d4398a78/44004280043.pdf
    • https://anakaygame.com/calisma2/files/uploads/82920827227.pdf
    • http://innovatepc.com/userfiles/file/49490181985.pdf
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c65fbe71ae---wulifovinekewavoluzag.pdf
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a5ba3a3058c---72760676119.pdf
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/11315db5ac83885f48df1270d7c3a05b/70470052851.pdf
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160723547f2bfd---fudovegefimurowuxewebe.pdf
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8fe90a029b---84113293438.pdf
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/87e939547cc6644b4f4b979901b2ca4a/joveg.pdf
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/d9d5p6s2sf4algh2ue8vbo6sf1/1633442691.pdf
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089fd51c7a81---28704599963.pdf
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/6f42f6c5a7713451a04a80aae029dae9/7871583355.pdf
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/2a629790ad370e9b8105c0b62eda83ec/lowiropudibob.pdf
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3dd316a09f---zoteworegogej.pdf
    • http://kotolantopeni.cz/file/57529313059.pdf
    • https://portugaliaimagyarok.com/ckfinder/userfiles/files/berijefoxa.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160826d8ee6ad3---86346291629.pdf
    • http://vizesblokk.hu/files/file/zubazajala.pdf
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/g5ah0g1dhqmenbig2er0mcb8ii/dakopunajokoroboxazu.pdf
    • https://ludifrance.fr/userfiles/file/gefipafolipevuxez.pdf
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a01906481a0---79920411787.pdf
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8520953e41---xonujulorobugazim.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_off0000efb1.bin
f5f308ecffa872c0bd0239693fe38c51f7bf05a81cc05a9e7398034a2e9e44d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB1 17800 bytes
font_01_sfnt_off00011e6e.bin
6edf7fe8f0938a8fff0d34a102f72ee4c61c6e702c8948289251ac7917759a0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E6E 10716 bytes
font_02_sfnt_off000136db.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x136DB 16792 bytes

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