Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ed9ed5d5cd372f7…

MALICIOUS

PDF

73.5 KB Created: 2021-09-16 17:09:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7a5960b6a57acb7283e24efa77938dca SHA-1: 836d1c9d10a87fd0b140202274af4e8a85c9f721 SHA-256: 0ed9ed5d5cd372f747ef2fea08dca9751454ab426ad99d67f5912d04335ab377
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised websites or disposable hosting, indicating a link farm designed to lure users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of multiple external URIs and link farm heuristics supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 http://kondicionery-dolgoprudny.ru/upload_picture/file/15722834848.pdf
    • http://footstepfloor.com/upfiles/files/moran.pdf
    • http://explosivedevices.ru/media/file/vuzagewejokin.pdf
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613a08526f621---5333209690.pdf
    • https://castel.ro/userfiles/file/mesumilu.pdf
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614285ace1de7---wifarateseka.pdf
    • http://f-okinawa.com/img/tmp/files/43382570391.pdf
    • https://lotte-ppta.net/beta/assets/file/29832511803.pdf
    • http://jujucuisine.com/userfiles/file/zotovumejenifuzixiripos.pdf
    • https://dailyiat.com/html_upload/file/16955655339.pdf
    • http://home-hj.com/up_photo/file/32478264020.pdf
    • http://centromp.it/userfiles/files/34455658621.pdf
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/c6d9b9c24caad705774cb9a5061f2944/86891472476.pdf
    • http://evola.it/userfiles/files/80150449539.pdf
    • http://studiotecnicobergamaschi.it/userfiles/files/tizogomadamaxobixo.pdf
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/77a244549faeaf70b96440fbe19c983d/25150326860.pdf
    • http://thegioimaychaybo.com/app/webroot/uploads/files/zufarikovudoto.pdf
    • http://cleanyachts.it/writable/public/userfiles/file/gatopimezovujakovoros.pdf
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161310c091f717---35700361656.pdf
    • https://clinicamanila.com/ckfinder/userfiles/files/dirarapojomuris.pdf
    • http://suliaok.com/v15/Upload/file/2021916183704676.pdf
    • http://agapetown.net/ckfinder/userfiles/files/rovilaliso.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=some+mp3+files+won+t+play+on+android
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bccd.bin
cd344749aeb14af14148315d69fd66517e9a6aca025fabf95b71c799024d8f93
pdf-font-stream PDF embedded font (sfnt) at offset 0xBCCD 11104 bytes
font_01_sfnt_off0000d6b7.bin
8c851ac2346afdcdf752138c4ee69a572aceea2d45ee2f196c02591fbcc8dc4b
pdf-font-stream PDF embedded font (sfnt) at offset 0xD6B7 16088 bytes
font_02_sfnt_off00010015.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10015 16792 bytes