Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f709e39cf8caaad…

MALICIOUS

PDF

79.9 KB Created: 2021-07-04 01:45:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 46ecc56fe72fc0ed48d36cb97f6b1360 SHA-1: 18978647a51a65baf01710a52424d1a855b03f41 SHA-256: 7f709e39cf8caaad89d1cd4ab8ab8560b257fe4bde55a4486821070280e1451a
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. Heuristics indicate it functions as a link farm, directing users to multiple potentially compromised WordPress upload sites and other disposable hosting domains. The primary goal appears to be directing users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://oversaslogistica.it/file/ravowifedixel.pdf
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/1710c4b280a8ad945a2cbe62d5ad4233/5622102678.pdf
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/4bnfp3acedk0311cpvv0ipv94t/60267415236.pdf
    • https://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/701bc31b5285e28ad510d9c299c20b5c/vopibunukomixiverotod.pdf
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/dc8550c04ba43084f39c59a912d7769d/44370959726.pdf
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/69bd9aqnsdu043o9ut53265ln4/nisimufibebakasuvim.pdf
    • http://esipro.lu/userfiles/file/57301036070.pdf
    • http://coyada.com/up_images/up_images/viketuxelobelap.pdf
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16072f808709d2---lipaxulororive.pdf
    • http://aisef.org/uploads/userfiles/file/file/41175842196.pdf
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/60ec612f152384c611d7e91250c13d73/rowavawefivowaxizemizuke.pdf
    • https://eobliecky.sk/userfiles/file/xulavanupexuv.pdf
    • https://chptravel.ir/data/file/79889136867.pdf
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c36cb54ff53---wumuzuxalapadanek.pdf
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/16085d4a44e879---75816568895.pdf
    • http://niezapominajkowo.eu/userfiles/file/rikoxubu.pdf
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/caa26dbcab09c974b1f275cee87de50e/52031427318.pdf
    • https://aicpwdosaeast.com/ckfinder/userfiles/files/nirexobez.pdf
    • http://immodraft.nrw/images/architekten_agentur_images_/file/44626256692.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160843d5d6cee0---18152562553.pdf
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be7a71659aa---tekositanekivijotulalone.pdf
    • https://reitinguok.lt/userfiles/file/fujupolepaje.pdf
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085bb7fcfc99---5368931657.pdf
    • http://xn--o79av69abka850ab6c.com/upload/file/202106190608578169.pdf
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7e1f5bc35c---69913623544.pdf
    • http://cosmickino.ru/sadm_files/27361139387.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=what+is+my+daughter+to+my+niece
    • 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_off0000d3d7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD3D7 16792 bytes
font_01_sfnt_off0000ebee.bin
602fa401d142df50d048024e2ab82268e7dee6bed1fa550a1cdc60e0547e43ba
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBEE 10980 bytes
font_02_sfnt_off00010510.bin
40a2ada8c9e233ce03558afc007621a6c6375583f134bd7af9fa92d32f83b678
pdf-font-stream PDF embedded font (sfnt) at offset 0x10510 17432 bytes