Malicious PDF — malware analysis report

Static analysis result for SHA-256 fae6fa2b69614f9d…

MALICIOUS

PDF

83.7 KB Created: 2021-09-06 17:52:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7c45ee29f162ae650057e03e96f81fab SHA-1: f9d648c4fce348b20fbf675f325e31225942309e SHA-256: fae6fa2b69614f9dbb79a05a217df9173d6320bdab6e87091a29f35d1b1c8c11
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 compromised CMS uploads and disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. The file's structure and URL patterns are consistent with a spearphishing attachment used to lure victims to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://samrayburnclassof1980reunion.com/clients/873185/File/rebenuruguzojetodubu.pdf In PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/ik1k43169r40ltk1hk7fil9gne/fivikuxugokeb.pdfIn PDF document text
    • http://dajuicebarus.com/uploads/files/23771679172.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082a4f62a8c4---lukaxepekisa.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/16070c6b5ccfbc---tamuxagolanadute.pdfIn PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/f405c37064797e839be0547ba48b0be1/39678031582.pdfIn PDF document text
    • https://lentes123.com/aym_image/files/wafezesisepemiturujarib.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/d4baf20504b1f068fba533e37c0249a1/68503859774.pdfIn PDF document text
    • http://mamnonsaokhue.vn/app/webroot/files/ckfinder/files/84447479366.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/lke8fcsc3g7j1skvg8ucei4u91/dodonus.pdfIn PDF document text
    • http://emilygrilltogo.com/uploads/files/geregajemerolak.pdfIn PDF document text
    • http://nceed.kr/pds/userfiles/files/92953823128.pdfIn PDF document text
    • http://benhvientantao.com/img_duhoc/files/9977491443.pdfIn PDF document text
    • https://kingcarmotorista.net/uploads/files/pememurufivawodinenu.pdfIn PDF document text
    • http://clarasonic.com/upload/file/64883432568.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/31a60bb13c6888a6a02d4c1ec8d5b25a/85378002895.pdfIn PDF document text
    • http://hangtatmj.com/userfiles/28249638836.pdfIn PDF document text
    • http://thebankcardservices.com/uploads/files/gadekimidagexel.pdfIn PDF document text
    • http://kag.fr/userfiles/file/lukitegusunitobumoke.pdfIn PDF document text
    • http://language-coach.pl/uploads/files/92590568209.pdfIn PDF document text
    • https://topconta.ro/userfiles/file/43776689837.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/987d0f47d7724d98ede82c7548d54d70/topolilarejukebe.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160e67fe725bf1---83479627989.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/d23f9c2ecab6b2f93f5104a58cade5bf/30742140501.pdfIn PDF document text
    • http://maxtarget.by/ckfinder/userfiles/files/4818250946.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/16083729816caa---gunub.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=organic+matter+in+water+and+its+decomposition+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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE276 11028 bytes
SHA-256: 9a247da3e2b87b1cc9820c2002000c0d25e9cf72bdbaee7a04ec1656b9f0565f
font_01_sfnt_off0000fc07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC07 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011419.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11419 17424 bytes
SHA-256: f50f8be916cecbb886162524ec997f007bb1db17f401aefa4989efd3e5cc54f5

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