Malicious PDF — malware analysis report

Static analysis result for SHA-256 06986fcaa714a59b…

MALICIOUS

PDF

84.7 KB Created: 2021-09-17 01:07:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 938848bdef0b55d297d02e58a687cd3b SHA-1: 81cb862dd64e325faa8a9e804b684e76de4da91f SHA-256: 06986fcaa714a59b9627f9465e255c66d48cc7539c1f751ea35f789f573a08c4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. ClamAV detection and ML classification strongly suggest malicious intent, likely phishing or malware distribution. The presence of multiple external URIs and link farms points towards an attempt to lure users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://smidgel.ru/uplcv?utm_term=bronfenbrenner%27s+ecological+model PDF link annotation
    • http://www.oneworldkarate.com/fckeditorimages/userfiles/file/nokixupotejof.pdfIn PDF document text
    • https://altaitur.com/ckfinder/userfiles/files/92608402165.pdfIn PDF document text
    • http://ayurveda-shiatsu-qigong-nice.com/upload/files/9985937929.pdfIn PDF document text
    • http://bestapp4u.com/admin/uploadedfiles/file/vosiromikinufonopamizo.pdfIn PDF document text
    • https://shen-su.eu/gfx/userfiles/files/govomemofogiwoja.pdfIn PDF document text
    • http://donghozibistore.com/luutru/files/38631531038.pdfIn PDF document text
    • http://elazentrale.de/images/uploaded/file/besevafirotusuwudadabi.pdfIn PDF document text
    • http://iberia-ex.com/images/blog/file/jenifobodasenizime.pdfIn PDF document text
    • http://firsttimehomebuyerstudy.com/images/file/ninapiwufizojujavobajadaj.pdfIn PDF document text
    • https://procogs.com/FCKeditor/file/80698452195.pdfIn PDF document text
    • http://ccsctda.com/ckfinder/userfiles/files/20210912_023034.pdfIn PDF document text
    • http://digivideos.net/ckfinder/userfiles/files/35369494653.pdfIn PDF document text
    • http://agedwedfjtj.pretty-match.com/upload/files/givezegimelimipinimoze.pdfIn PDF document text
    • http://roberlo.cz/www/files/file/5870494441.pdfIn PDF document text
    • http://cabinet-blin.fr/ressource/site-image/files/wutogetafowanazafokexu.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16135f7d11dc26---nemosababanonigudifurilo.pdfIn PDF document text
    • http://myoffice2561.sesao33.net/UserFiles/File/radedixadojegenilivata.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1613b6aa63ec88---wobobavidovibimegoxoge.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/161356171cfdb1---sarazo.pdfIn PDF document text
    • http://chizclean.ru/files/fck/file/zegivinufuxila.pdfIn PDF document text
    • http://gsprojekt.eu/userfiles/files/kegurosonitapujama.pdfIn PDF document text
    • http://kes.org/upload/editor/files/vodelapipobewomujip.pdfIn PDF document text
    • http://dioblina.eu/userfiles/file/nusiwuvewotokefunow.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/094ecfc7bd3a3cdf48acf488cb6a22c9/21904501145.pdfIn PDF document text
    • 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_off0000e32c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE32C 10948 bytes
SHA-256: caa69c668bce3fdea7dd289c1310f833007e74fc963fa7aa47b64f0869115d38
font_01_sfnt_off0000fc5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC5A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001146c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1146C 18888 bytes
SHA-256: 3bc4f46ad57ea2e26b1c4a4436a02ef4537564dc583083484576f200316a973f

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