Malicious PDF — malware analysis report

Static analysis result for SHA-256 066e2bd5afae43ba…

MALICIOUS

PDF

82.4 KB Created: 2021-07-30 13:48:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 6d4082ff71b6c5e0cb5bd34ef9c86a7f SHA-1: dfb556fc3f73fba076a2e77b4293ce4284225efa SHA-256: 066e2bd5afae43ba0ab6bd34891b63b58bce76a3976cc15892b9eeefd7064d78
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, and the document body was unreadable, but the heuristic firings clearly indicate a malicious link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073cdf798743---26837373144.pdf In PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a95d3b7d467---sekupatazufiketudalu.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/7546138667.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160ccc2676b625---97608324427.pdfIn PDF document text
    • http://izumrud38.com/ckfinder/userfiles/files/fugipujomugejegozisalopur.pdfIn PDF document text
    • http://sola-brothers.com/userfiles/file/vitonuzurotitoru.pdfIn PDF document text
    • https://girl0229960192.com/upload/users/files/lejogepanotugeguvu.pdfIn PDF document text
    • http://www.thunderesp.com/ckfinder/ckfinder.htmlfiles/39161630211.pdfIn PDF document text
    • https://clubforeducation.com/FCKeditor/userfiles/file/3502883568.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e5c2f26442b---miwozeniwaj.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a9147571861---malufidudovokuk.pdfIn PDF document text
    • http://unipsyclinic.com/userfiles/file/20210628050129.pdfIn PDF document text
    • https://vicotelecom.vn/static/source/images/file/fivewitiminonuju.pdfIn PDF document text
    • http://dichvugiayphep.net/hinhanh_fckeditor/file/ridulivebonomefuv.pdfIn PDF document text
    • https://dm288.rs/slicice/file/53079390434.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a948e91d35b---xakuraniwiwupagagijeda.pdfIn PDF document text
    • https://ihotel2b.com/upfiles/editor/files/75049076687.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608bc3fcca3a9---40516383912.pdfIn PDF document text
    • http://champaigncursillo.com/userfiles/file/xejoferonavepixogenos.pdfIn PDF document text
    • http://z-i-f.ru/userfiles/file/77361756347.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/9d6d0dea6934337dc55034eec63a745b/sasigabimokude.pdfIn PDF document text
    • http://anpo.vn/upload/files/timeroleguguraxizade.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/sn1i8dphboo6hfdbatvvtt2339/82787928595.pdfIn PDF document text
    • https://et-auditing.com/userfiles/files/rebivorononikatowexamewu.pdfIn PDF document text
    • http://korealabels.com/ckfinder/userfiles/files/32358967443.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=12+rules+for+life+summary+pdf+in+hindiPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE9F 10952 bytes
SHA-256: f17af1889214b8cfcea5bda9e516c63f2d2a93bbbfd8eba3a57dd8cf06730545
font_01_sfnt_off0000f7e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E1 16792 bytes
SHA-256: 08df2c1545f13e52382053abdc3f2aae8c4f7048262ddc276b4badde0d218f6f
font_02_sfnt_off000123c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123C9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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