Malicious PDF — malware analysis report

Static analysis result for SHA-256 8675a9e132ef7afd…

MALICIOUS

PDF

73.4 KB Created: 2021-09-11 21:50:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d10e48c2e4f9eb37f6f5d5d315583ac3 SHA-1: 9061675a5cbc12558aa954da502cd2c83da9235f SHA-256: 8675a9e132ef7afd4347a1402205aabe2fef82ebaefdcf4427250e5783f8ba50
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as 'Pdf.Phishing.Trojan' and an ML classifier indicated a high probability of maliciousness. The document contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting it functions as a link farm. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/adbdbfb6831a8945f28e3fc9270cf3bb/bovabuvekefirolulope.pdf
    • http://addon-colsman.somantec.net/ckfinder/userfiles/files/tifanavefefunuselub.pdf
    • http://alfonsoguiggiarchitetto.it/userfiles/files/3889180750.pdf
    • http://juditphotography.com/picture/userfiles/file/89356062945.pdf
    • https://ximatinhdongnai.com/app/webroot/files/images/pages/files/33451073738.pdf
    • https://finliz.lt/i/File/weridefazudevewaxi.pdf
    • http://shinies.ru/img/lib/file/tilavopifatejifubemiva.pdf
    • http://raffaelecavazzoni.com/userfiles/files/dibarexalosazus.pdf
    • http://vietsaovang.com/uploads/userfiles/file/vumerezixoguduguxugosurex.pdf
    • https://ecoolteh.eu/galeria/file/2523694528.pdf
    • https://kaskad-74.ru/images/uploads/932426829.pdf
    • http://warmistore.com/userfiles/file/judugodoruvepag.pdf
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16139f900ba711---13270025751.pdf
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16135f8df26b47---17073774266.pdf
    • https://baust.edu.bd/app/webroot/ckfinder/userfiles/files/33089670826.pdf
    • http://vnationwide.com/userfiles/files/15123229047.pdf
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f5b1eeecfd---97570061303.pdf
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136e2e8e28c7---vawata.pdf
    • https://tradingphrases.net/userfiles/files/vutal.pdf
    • http://elcolono.net/userfiles/files/82869737586.pdf
    • http://actinq.nl/upload/file/sinujenitepinabe.pdf
    • https://legend-chang.com/UserFiles/files/34047884735.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=one+piece+bounty+characters
    • 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_off0000ba16.bin
728b82e5ebeead1e5cb4648d1226faace2fe74c59a04f458b829c62150cf149f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBA16 10804 bytes
font_01_sfnt_off0000d2cb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD2CB 16792 bytes
font_02_sfnt_off0000eadd.bin
c2474c999d7594a7e2e6d806c9943338d75179983774327bd61cbe96ae7a87b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEADD 17460 bytes

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