Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8b24f718888e85b…

MALICIOUS

PDF

103.8 KB Created: 2021-07-01 09:51:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 67ee7f4f1f5a1d2cc0c631c0f3764215 SHA-1: 8e0a0bafd1a9b5e44e2df667837e878d04878c2a SHA-256: c8b24f718888e85b050475666762954c5751a964b6831b58efffd98c1b22565b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload storage and other disposable hosting sites. The primary purpose appears to be redirecting users to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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 http://jinohair.com/upload/files/kotugixesodafeperolutafew.pdf In PDF document text
    • http://qzgj.cn/upload/file/tataxukemasipa.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/44644836644.pdfIn PDF document text
    • http://szyldkj.com/luodan/images/userfiles/file/lakajalagaxabofosazekol.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/363ec8cfdf9536a9218f931c9f737e7c/werigalipiwelasinagolezum.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/efh5o96gdeh9oa43kvjdbuv9ld/dozokapufusarufinoza.pdfIn PDF document text
    • https://limblength-sldf.com/userfiles/file/tasajilalunobaladofopa.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aef3fe5cdf1---jirolubonoxax.pdfIn PDF document text
    • http://seventyfirstclassof69.com/clients/60772/File/fafebinotudunarofivutun.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16077172d8565c---livusefokanetekixigosiped.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160741bb519e99---57635883370.pdfIn PDF document text
    • https://atrax.hr/files/sowuxafejevojubazoru.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078982407a8d---sokevovoli.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16071c7cb40840---lapuwuxi.pdfIn PDF document text
    • http://bizbecho.com/pa/trainstation/uploads/image/file/8292802448.pdfIn PDF document text
    • http://jdhs77.com/clients/58520/File/15518578761.pdfIn PDF document text
    • http://nieruchomosci-swidnica.pl/userfiles/file/winale.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.com/userfiles/file/79369411948.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/javu4s894g6oiiq220vb0shm39/29758791028.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160981de8706ec---69286241849.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b4d4ca338d5---12065685365.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=clever+spa+troubleshootingPDF link annotation
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000130be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130BE 10868 bytes
SHA-256: 1d411bd6bb1536d00c531d306860bb3d8df093e1b2dcd4a123e4d3d3b66e40f9
font_01_sfnt_off000149a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000161bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x161BB 18024 bytes
SHA-256: 8e1f3df6577b4b52e5a815e1a50353339ef503eb2b592f116d79b01c4d9e5047

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