Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d004fb6cf8d54a1…

MALICIOUS

PDF

69.8 KB Created: 2021-09-16 17:51:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 8ff4905adf5677bc15d090fe025d961d SHA-1: 4afb7c02b9d25ced909c0705c40d312506a53d6e SHA-256: 0d004fb6cf8d54a1c2bba755a73af8a81aa9f960adfe79e512807b9275ddda9a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to deliver a phishing lure or download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/aaa437d3c73037fc0f051ce23cdde9f4/palizakudowi.pdf In PDF document text
    • https://worldpigment.com/image/upload/File/mipijazozugakukubuninaveb.pdfIn PDF document text
    • http://saxonrt.hu/img/userfiles/files/10042610657.pdfIn PDF document text
    • http://gzcaifeilai.com/ckfinder/userfiles/files/202109022206101029.pdfIn PDF document text
    • http://melly-incendie.fr/img_db/53436314425.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16138eb9d5c273---46883150563.pdfIn PDF document text
    • http://theorientgarden.iorderfoods.com/uploads/files/15914797999.pdfIn PDF document text
    • http://thechitay.com/uploads/userfiles/file/gusik.pdfIn PDF document text
    • http://timnhanhonline.net/upload/files/sunifap.pdfIn PDF document text
    • http://viacaosaopedro.com/www/js/ckfinder/userfiles/files/gojodalumokusebovomemeno.pdfIn PDF document text
    • https://capital-publishing.com/ckfinder/userfiles/files/76486727439.pdfIn PDF document text
    • http://studiobonvino.com/userfiles/files/62835058373.pdfIn PDF document text
    • https://etonbio.com/newsLetters/images/file/buzowutotukepopon.pdfIn PDF document text
    • http://dunakeszi.varosom.hu/userfiles/files/94114316902.pdfIn PDF document text
    • https://dewalt-naradi.cz/media/upload/editor/file/66521077328.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16130f775e1183---lebenuwadetob.pdfIn PDF document text
    • http://gianenricofabro.com/userfiles/files/91474966842.pdfIn PDF document text
    • http://dydlhx.com/upfiles/file///rarujowufiwatezolabekalu.pdfIn PDF document text
    • http://www.mostenpo.jp/userfiles/files/93057010076.pdfIn PDF document text
    • http://archiprojektai.lt/app/webroot/uploads/userfiles/files/kubatutipezu.pdfIn PDF document text
    • http://sns-russia.ru/userfiles/file/duwutusek.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/mcjrmie2s8e912o1u8643op30m/31889943814.pdfIn PDF document text
    • https://hinodecoder.com/userfiles/file/malijek.pdfIn PDF document text
    • https://banktapeunadana.com/tapeunadana/bank2/admin/userfiles/file/dufuxajituxisutiwadowadaz.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/f4947e01b4e79933bdea029ddde6d519/38361245185.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=nba+live+hack+mod+apkPDF 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_off0000b50b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB50B 14520 bytes
SHA-256: 8295f5c6fd49511aa59239eeb522ddbd6a764b5dd5535d2c052d33fd12b38d2f
font_01_sfnt_off0000d986.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD986 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f19d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF19D 10584 bytes
SHA-256: 1f3a9f023f1be595b49b592ed79f9dfdba4540e2e697557d1f439d9a68fd69a4