Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbaca25d89d1c7aa…

MALICIOUS

PDF

77.8 KB Created: 2021-03-09 22:57:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: c63a92e92577d757fbbd6a1a1f91d5d2 SHA-1: 9c68d17f2ba0381e960e127365168c348649b042 SHA-256: bbaca25d89d1c7aa4e560f154d40682dcef8e2950ecf3ac7d94fd0fdf7853bc0
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the ML classifier output strongly indicate malicious intent. The document's structure suggests it's designed to host a link farm, likely to distribute malware or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/award?keyword=peter+drucker+books+pdf In PDF document text
    • http://prizinsta.online/what_model_kindle_is_d011005wv4l.pdfIn PDF document text
    • http://wejuveziwep.mypressonline.com/sleeping_beauty_waltz_piano_duet.pdfIn PDF document text
    • http://nakalabaxis.mywebcommunity.org/dutojuzo.pdfIn PDF document text
    • http://prizinsta.site/where_are_canadian_spa_company_hot_tubs_madeeh5bf.pdfIn PDF document text
    • https://litemavokof.weebly.com/uploads/1/3/1/8/131871991/170eea87f.pdfIn PDF document text
    • http://gewututikame.getenjoyment.net/pedapugu.pdfIn PDF document text
    • http://vadakob.22web.org/36662464067.pdfIn PDF document text
    • https://rozinezo.weebly.com/uploads/1/3/1/6/131636990/madipugofudozugov.pdfIn PDF document text
    • https://nabinavupofi.weebly.com/uploads/1/3/5/3/135350319/d3b671251a8b0.pdfIn PDF document text
    • http://kexazejarufag.iblogger.org/glioblastoma_multiforme_mri_findings.pdfIn PDF document text
    • http://fogugevup.22web.org/penadateguxubevimula.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f4a84cb-017a-4060-84f0-ed266935e083/jogobojimuta.pdfIn PDF document text
    • http://rukosivujuxu.atwebpages.com/divergent_movie_free_streaming.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17bda814-a6fa-4bcc-b26e-79441ae80965/the_lord_of_the_rings_movies_in_order_from_first_to_last.pdfIn PDF document text
    • https://07bd7893-a6ec-44d5-90fe-c719e602c0bd.filesusr.com/ugd/aafaff_b3464bc159284839874cd9f885206899.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c9561c1-72e1-4913-b992-e1678ddf9ac1/52206512152.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87cc8815-00fc-498e-a57b-d4f9da57d864/vaferodok.pdfIn PDF document text
    • https://d52aed46-be45-4f9b-8106-cf6fc7ee66c0.filesusr.com/ugd/b148e5_feade85df249462eaa32ad3e21c52232.pdf?index=trueIn PDF document text
    • http://xubaforan.epizy.com/alan_wake_achievement_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01628e23-68e5-4d29-bed5-63821bc33f42/star_trek_movies_new_cast.pdfIn PDF document text
    • http://zotubune.myartsonline.com/89706090999.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://scripts.sil.org/OFLIn 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_off0000e076.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE076 5112 bytes
SHA-256: 572b74e456756769a1e31a8abc72014af140f1736c8fc3ea018659a4482bd2f3
font_01_sfnt_off0000f1eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1EB 10196 bytes
SHA-256: 303f3da99a2a2f0a2dbe7b39667bebf4fb83a64c897f68c620e3253fad1f9e0a
font_02_sfnt_off000114fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114FC 16076 bytes
SHA-256: 2e8947c527022c2777c705293212bdbe99a5eaa236b45d3d417db44d5e5616b8