Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e76708bdcf77f0c…

MALICIOUS

PDF

73.3 KB Created: 2021-06-11 13:02:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 5f197908eb1bc061c30fe6b892f5b307 SHA-1: 1007356a502037a42370139998e88d06f256d63b SHA-256: 0e76708bdcf77f0c8c85b51cdc447c0ff0bd0973d029fe0f2635345deb986a55
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document is classified as malicious, likely a phishing lure, by multiple heuristics and an ML classifier. It contains numerous links to compromised WordPress sites and disposable hosting, suggesting an attempt to distribute further malicious content. The document body, though heavily obfuscated, appears to be related to search terms for free t-shirt mockups, indicating a deceptive pretext for users to interact with the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://garglob.ru/uplcv?utm_term=free+women%2527s+t+shirt+mockup+psd PDF link annotation
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/eb0b007950021b09d1d4bfb5ef6196a2/nunuzoxukadupibokaboraz.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac7ebd0046---moduvokizufakeravis.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6d47f963ff---27819765319.pdfIn PDF document text
    • https://haltia.mx/sii/ckfinder/userfiles/files/23956670351.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f9414efd67---fazisurunojenu.pdfIn PDF document text
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/93606dbe2216dc5a8b048bdd9640149c/77179860205.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c9f0b09a97---89708795878.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/bc5ee8d53b77217b4550d1be62395669/xibasefezemabimigof.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3e318bed7c---lefuf.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b7eadee7e3c---95910263954.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/16081278626be7---podoviwemalumo.pdfIn PDF document text
    • http://kagoshimakojintaxi.com/userfiles/file/xaginut.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/n1hh3u50tgenqs9776tee8p9hj/70302428853.pdfIn PDF document text
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/74883340113.pdfIn PDF document text
    • http://biancoacolori.it/userfiles/files/gisokubopaju.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1AB 5216 bytes
SHA-256: 774f203f6fc6b18752816adf3e4935ec92a5d3e0f85bcad5147aa3549ef0697b
font_01_sfnt_off0000f35d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF35D 10716 bytes
SHA-256: e19dd1aba2a9fc0b6907eb66011eae3790d2c6a9cdf548cdeeb3dc77db5e8541