Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e0474f26c578f7b…

MALICIOUS

PDF

80.6 KB Created: 2021-08-22 00:08:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: b4b974ec4e8733b19f04b8278ffa5e4d SHA-1: 6e2eff5e4c59952115efeea0059592ec67a221fc SHA-256: 5e0474f26c578f7b15a11c126cfb9eeb3b5518a17b142905626142bb2b66ae83
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many of which point to disposable domains or compromised WordPress sites, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious content or phishing pages. The embedded JavaScript is likely used to facilitate these redirects or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://jdhs77.com/clients/58520/File/19322957448.pdf In PDF document text
    • https://iword.de/userfiles/file/wajomupexirujigiwi.pdfIn PDF document text
    • https://goez3.com/10005001208290177/ckfinder/userfiles/files/77876982445.pdfIn PDF document text
    • https://kmkmekanik.com/upload/ckfinder/files/nunejax.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/dafeee0724e1e4ece57ed82143df534e/73897985419.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/29312375132.pdfIn PDF document text
    • https://locktactyuma.com/userfiles/file/13939884440.pdfIn PDF document text
    • https://szabolcsipeter.com/userfiles/file/36166185459.pdfIn PDF document text
    • https://lesartsdansmonjardin.com/userfiles/file/20210628032425.pdfIn PDF document text
    • http://koreadramatour.com/FileData/ckfinder/files/20210710_94CA3F917278AD20.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc8ebdcfda---nafavosidobefumetafib.pdfIn PDF document text
    • http://lorichphoto.com/pictures/file/xigajajamuva.pdfIn PDF document text
    • http://younewstoday.com/task/userimages/file/jejawijatividumaxu.pdfIn PDF document text
    • https://mimpiindah168.com/contents//files/xavefi.pdfIn PDF document text
    • http://mikllc.mn/uploads/files/xipavafixamixegafebem.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608784172ac0d---39299378028.pdfIn PDF document text
    • http://mygiftltd.com/userfiles/file/zafujudejipejuv.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e8a33a55e0---48358006374.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160acda750ec85---49089697378.pdfIn PDF document text
    • http://residenceraffaellotorino.com/userfiles/files/tirofabivesafifep.pdfIn PDF document text
    • http://fanta-life.com/userfiles/file/97645239899.pdfIn PDF document text
    • http://www.thegrcinstitute.org/app/webroot/js/ckfinder/userfiles/files/wirezujibodizujavakar.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070137bcd1f4---foranem.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=sennheiser+pxc+550-ii+wireless+manualPDF 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_off0000d3db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3DB 11076 bytes
SHA-256: 5e804ad6bce2309ed2e8e16cab7bc0013b943234a8ebe7582ac3c511f4090f85
font_01_sfnt_off0000ed89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED89 16624 bytes
SHA-256: 34a00be2cf29088c9b92a148e5f56a1ecdc7e86c3ee4a367c381b8fe59700153
font_02_sfnt_off000118e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118E4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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