Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d7349bea08f059f…

MALICIOUS

PDF

91.5 KB Created: 2021-08-11 10:57:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 678de9757605288c9ed910830089e308 SHA-1: 39ab25f844d3a4655f3666d35eda91da73a8fab7 SHA-256: 0d7349bea08f059fcdeee4bc61a9be82e9bcb652a9eb138e8c8a2797f61af96a
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution via these links. No scripts were extracted, and the document body was unreadable, so the attack pattern is inferred from the URL analysis and heuristic firings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

Heuristics 6

  • 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.
  • 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://agataklimowska.pl/userfiles/file/pakuni.pdf In PDF document text
    • http://www.bufolari.com/public/immagini/file/nazubapafurotokonil.pdfIn PDF document text
    • http://alpha-cp.com/userfiles/file/fagurivavitiwuvulu.pdfIn PDF document text
    • https://ovalpolycoats.com/media/79990470799.pdfIn PDF document text
    • https://isleo.com/i_photos/file/zoruwuzisarexirufogijevax.pdfIn PDF document text
    • http://allasclub.com/campannas/file/79596067518.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4b9eaaf2cd---40934735935.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/qc25ebvhito7sab206ie62ak6h/20183163019.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/579885d0943fb480fdd3fecf0ea2f9ba/xijurulitowukukulimoriso.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160fe3858ce73f---mukekenadekimokigufoka.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae88fa3b188---gurelim.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/widemasebinuz.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160810a265ee41---13366471521.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/16078b131c4c6b---64237504903.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/a847a02e2f82abc5ffe0757c66a48404/mesidebenerubewuperi.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f79c47a4dc3---88904513670.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/dl8efrra7n65v2r4gvdm4th0u5/79191228197.pdfIn PDF document text
    • http://biancoacolori.it/userfiles/files/89887759913.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/jisidifazuvuzoputakofuze.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1609dac9eb2b77---galuvifuwoliruxepetazo.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/5945276c9a8c8e1c0ed3a123d1bb34c3/21727863277.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/58027326278.pdfIn PDF document text
    • https://o-dance.com/upload/files/xavunolezezadixogukebumef.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=attestation+sur+l%27honneur+caf+pdfPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ffda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFDA 19000 bytes
SHA-256: c4b6c3127a304bc58e836d876185fd77a6f7f8f3a1ab540172b5d712e5029ec5
font_02_sfnt_off00012fe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FE6 16132 bytes
SHA-256: 43ac470fcea589ff610178d7ee8b4eca3d7ebca5e1a90d9dbe30350601643f36
font_03_sfnt_off0001452a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1452A 10832 bytes
SHA-256: ff374f3d40cfffec76432bae012349ea949969beccae0b86b13dc65ca3233ead

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