Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e89e96dd25cbf7a…

MALICIOUS

PDF

68.8 KB Created: 2021-09-26 03:37:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 5db6e625fd5c15ac6c61c25f3ea24ecc SHA-1: 7060066b5a1478645455327137092067909a82e0 SHA-256: 2e89e96dd25cbf7a8067284251781ada42a1e738d513993b9f3161983a93e322
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external URLs, some hosted on compromised WordPress sites. The presence of numerous URLs, including those with UTM parameters, suggests an attempt to manipulate search engine results or direct users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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 https://huntic.ru/uplcv?utm_term=how+to+screenshot+on+galaxy+note+10+plus+5g PDF link annotation
    • http://munnarteabungalows.com/userfiles/file/50349614339.pdfIn PDF document text
    • http://alt-1c.ru/userfiles/file/13229769170.pdfIn PDF document text
    • http://lafiestadelmoto.cz/files/file/10938645184.pdfIn PDF document text
    • http://lovesushiscv.com/uploads/files/bekodirazegufenupikikazu.pdfIn PDF document text
    • http://voyagevietnamlaos.com/hinhanh/file/77565386228.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613617f09bdd6---96132069013.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613bee30a1198---laxigugimuxigumamasogi.pdfIn PDF document text
    • http://ex2010.com/uploadfile/file/2021091006181073499.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161439c9fbb34e---24528554623.pdfIn PDF document text
    • https://www.restaurant-latableedevercel.com/ckfinder/userfiles/files/zifipafoxofuwunanun.pdfIn PDF document text
    • http://abwingsde.com/uploads/files/kefekutegerijixesolo.pdfIn PDF document text
    • http://westpakusa.com/phpsites/vertical_living/uploads/file/8500414719.pdfIn PDF document text
    • http://propack-th.com/image/upload/File/weganaromakutupogutare.pdfIn PDF document text
    • https://behagi.eus/files/galeria/files/xudawunudanuwukiwotavajas.pdfIn PDF document text
    • https://chuyennhakienvangvn.net/upload/files/verepoje.pdfIn PDF document text
    • http://sarkar.ie/userfiles/file/64375218463.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614de7cec09e5---litutuzenezugolo.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/girefeberokigedomivira.pdfIn PDF document text
    • https://sharjahcements.com/images/bulk_images/files/jovepimovega.pdfIn PDF document text
    • https://vili-al.com/uploads/wysiwyg/files/kavitawu.pdfIn PDF document text
    • https://istanajp.com/contents/files/87671607879.pdfIn PDF document text
    • http://keyflounge.nl/userfiles/file/6653009271.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_off0000adde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADDE 11264 bytes
SHA-256: 905712b7c280415dca9d6db16d145ad510faee039bb6c16a6dc89dad3f23de85
font_01_sfnt_off0000c86b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC86B 14716 bytes
SHA-256: 98e17c341928e4eb9bf077762eda5f51ce939cee154efcd1e6be5a469f643304
font_02_sfnt_off0000ed6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED6A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1