Malicious PDF — malware analysis report

Static analysis result for SHA-256 426c0edb8145edbd…

MALICIOUS

PDF

89.4 KB Created: 2021-07-07 04:22:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 9d9c1cb69cc2213c348fdb3afcd8dbb9 SHA-1: d17d781f37243482f2028439ef8b9a407deb5cee SHA-256: 426c0edb8145edbd81424a4164d762ef874ab4d575f75af84043bf60522f161f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to lure victims. The presence of these links and the overall structure indicate an attempt to direct users to external malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://drafthe.ru/uplcv?utm_term=soul+eater+behind+the+voice+actors PDF link annotation
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a7e2c2cb51e---xikunagakav.pdfIn PDF document text
    • http://mfcwestenkwartier.nl/beta/userfiles/file/xomelorovuxagil.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a328797f5ef---lipetipumegi.pdfIn PDF document text
    • http://emailreceptionist.net/userfiles/file/87295315704.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160987aba148d1---81370937544.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/553h66gn6vt0j2u65gs00gsbo1/69829101761.pdfIn PDF document text
    • http://m-camper.ru/ckfinder/userfiles/files/nezogananoterali.pdfIn PDF document text
    • http://hani-bee.com/userfiles/files/lojiradamizuxepalupurikul.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/b57rosdm9ld7ptb45890l4u5um/suxubabotenulemigepus.pdfIn PDF document text
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/56133dc1c2dbc67d5a18e7ff2e0eed10/51554658821.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6ebccc46ab---bupukakikagamali.pdfIn PDF document text
    • http://tele-video.ru/upload/files/zevuporukofodewadafimodo.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d351a20e713---miwodopapugibozamasive.pdfIn PDF document text
    • http://acril.ru/ufiles/files/46132775412.pdfIn PDF document text
    • http://elateridae.com/images/FCKeditor/file/5729696359.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/2sjodbcfj98bkh21j7ekm26njf/vepewomusazezosuri.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/2sg0d5auo8shdat6kma6cbfafv/76203918499.pdfIn PDF document text
    • https://xn--faades-mtal-n9a6a.ch/ckfinder/userfiles/files/91413674482.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160ab030b6baf8---43871452677.pdfIn PDF document text
    • http://ucity1967.com/clients/f/f9/f95c10655bf48216a4b8c8e4321ec146/File/98119258768.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/a00ce5717d4ab3ce2c8054ef67e04d83/56942446872.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAB 10848 bytes
SHA-256: 8d00f1f40330ae0ac1c3d994b589ab71e2fe5e76ca01768b639844b3232a34ad
font_01_sfnt_off0001069d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1069D 2124 bytes
SHA-256: 70a703ee3c81103fdcb61db8554a3760f6c97e8fbec2946a7dc0b3ae9bfdd4d3
font_02_sfnt_off00011047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11047 17728 bytes
SHA-256: 3da440a2f422cff67fc692487b18a02e2e16427fec6a638cfe216fd11bb3dfc4
font_03_sfnt_off00013e2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E2E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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