Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed2017f97ae5b20f…

MALICIOUS

PDF

86.4 KB Created: 2021-07-02 01:02:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 0600644a24a408e3a40713f3f1633f01 SHA-1: c46fc9ecf7e4013851669f5a4f89310dc2a4ec0b SHA-256: ed2017f97ae5b20ffc6b78c4675c146f5e7bc0fff2b6de68c94b32d654baf7f8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs and link farm patterns, suggesting it's designed to redirect users to potentially compromised websites. The presence of multiple links on disposable hosting and compromised CMS uploads further supports this phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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://crewmak.ru/uplcv?utm_term=binding+of+isaac+seeds+switch PDF link annotation
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/j1lr7lnto8ocbfc20anr5iui93/fomipowemetidoleno.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/4a107e73790cb2cad92f6c29ee871531/2593987902.pdfIn PDF document text
    • https://gemwares.com/userfiles/file/44145641758.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/begifi.pdfIn PDF document text
    • http://amctop.com/board_data/editor_img/file/202105202202.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160af9533768eb---neginumelibot.pdfIn PDF document text
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/gstnbqf5fkvfd17bu9lid4bmqb/17709852823.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070721184f7d---97998076989.pdfIn PDF document text
    • http://aliglobshop.com/userfiles/file/34986692063.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/jpkmrc6k14ot87t5te2j608i78/zipetopupigarunolegutusas.pdfIn PDF document text
    • http://dolphinegypt.net/userfiles/file/soluga.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c58a6ec418c---5072509180.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c289b21227f---90368354112.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae7d3adc02---71331587383.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/713f71f93cb25bca631d6698af2f8b01/44192269960.pdfIn PDF document text
    • http://cathugo.de/res/wysiwyg/file/2586836432.pdfIn PDF document text
    • http://novussiteyonetimi.com/uploads/file/32642481934.pdfIn PDF document text
    • https://onlinendttraining.com/files/46557162245.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607a4205e935e---sakavajudipewenotisobu.pdfIn PDF document text
    • http://sillajen.com/fckeditor/_upload/file/93728894128.pdfIn PDF document text
    • http://prtourusa.com/FileData/ckfinder/files/20210620_EEA2F1DBAF9866E2.pdfIn PDF document text
    • http://gallery4walls.com/upload/editer/file/pixebilopupezuzimanomege.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/vevos3lrr6so0q7sqoi4hr9rs4/wujazinaden.pdfIn PDF document text
    • http://okfilm.kr/userData/board/file/tuxewodinibewem.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1608ef80be491b---muwazixobes.pdfIn PDF document text
    • https://lederstuhlshop.de/ckfinder/userfiles/files/nejew.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_off0000e932.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE932 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010149.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10149 10748 bytes
SHA-256: 7c7024f5c82b0d31926b47d1989ccba5bbd09ac51956931bfe7045ff307c41b6
font_02_sfnt_off000119da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119DA 18852 bytes
SHA-256: f431e8abb73286edb5a183400931600371b7be432e1b97696da99a5b8ef3788d