Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac6f2afa212bf7a4…

MALICIOUS

PDF

256.4 KB Created: 2021-09-02 07:55:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: e699bd9641652c983a4a6faacdd54c2d SHA-1: 25ff1b9ab659a6797a5fcf73af49bc5b1200952a SHA-256: ac6f2afa212bf7a41416f5a0c8a1acd01329188162781400a6d09da899cc8f7a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting it's part of a link farm or phishing campaign. The embedded URLs are likely used to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9183

Heuristics 5

  • 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.
  • 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.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f050e4e17f---bajijogawufagos.pdf In PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161089eefc212a---gavif.pdfIn PDF document text
    • http://masseydogs.com/clients/f/fc/fc2e217ffa4851e49ca3cd921a15cf41/File/gisewetuvepeledobaforela.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16078cff1e31b2---31758133103.pdfIn PDF document text
    • https://vieclamday.com/userfiles/file/13920616747.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/ae745706fff7ca22f30963a071bf070a/bejemejobexogitulabori.pdfIn PDF document text
    • http://www.mmalappeenranta.com/tiedostot/files/77021443394.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/c554ba0f3f3cd16ea606c99d63b58ec6/12486530601.pdfIn PDF document text
    • http://zaun-produzent.de/userfiles/file/27906675673.pdfIn PDF document text
    • http://hongpakthai.com/ckfinder/userfiles/files/94503098824.pdfIn PDF document text
    • https://davidfauquemberg.com/home/fauquemb/david/bbdg_site/userfiles/file/10928360277.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf428b347d3---2587274844.pdfIn PDF document text
    • http://club-integra.ru/userfiles/file/12172022513.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/e77f2080d8806d98f8fa27012c0aaac3/mafopobulazegigotaguxemes.pdfIn PDF document text
    • http://potya.com/liledutetubovuja.pdfIn PDF document text
    • http://sibinetweek.ru/userfiles/file/fopagineluzipugiravefa.pdfIn PDF document text
    • https://dietacud.eu/upload/file/tozerazopasokisopunik.pdfIn PDF document text
    • http://chieucoingason.vn/files/93596174848.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073e5d227bd3---33100503947.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d321e59f0b---90015694871.pdfIn PDF document text
    • https://dianthusindustrial.com/resimler/files/navugoginefitiwavofoniko.pdfIn PDF document text
    • http://xn--365-pn7mwb654m2qn.com/ckupload/files/26855928826.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=curtsey+and+bowPDF 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_off00038811.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x38811 21636 bytes
SHA-256: dc46aed1aadc5f4c88224b50d059b881812b785eb2c83bfd358bc82ab4769b04
font_01_sfnt_off0003c0f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3C0F5 10572 bytes
SHA-256: 86bcd03fcb56c4dd91c30c8ee915edd58c7224785adfc96b171f009c4206518d
font_02_sfnt_off0003d959.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3D959 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1