Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcef2ce0dabc1d10…

MALICIOUS

PDF

90.0 KB Created: 2021-04-02 19:05:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: eca63a3a235158dd5a5c9ad95d6c88a2 SHA-1: c0ecdf8c71b36e86ff52f77538194dc3faf56e2e SHA-256: dcef2ce0dabc1d1095f1ee83a64d0b5f393b58c69d5c845fa5f95cfed7ea6846
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, with one specifically noted as a link farm on disposable hosting, suggesting an attempt to redirect users to malicious sites. The document body, though truncated and partially garbled, contains a title related to a water timer, likely a lure to encourage clicks on the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • 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://pelibifir.ru/aws?utm_term=orbit+water+timer+won%2527t+turn+on PDF link annotation
    • http://fobativ.mywebcommunity.org/titase.pdfIn PDF document text
    • http://noverst.xyz/art_wallpaper_hd_zedge_iphone785lk.pdfIn PDF document text
    • http://trendmobile.ru/guitar_music_theory_lessons_podcastihq0q.pdfIn PDF document text
    • http://businessoutsourcing.org/vefobosuwonogodiqk.pdfIn PDF document text
    • http://onlinetiser.website/what_are_the_different_types_of_estatesblqcz.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuzajomugi/jWvXGih/teachers_college_reading_and_writing_project_resources.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzudulo/heihhga/12664613130.pdfIn PDF document text
    • http://bonusiotsbera.online/30163191068l3hjw.pdfIn PDF document text
    • http://goproonly.com/what_is_the_best_online_yoga_teacher_trainingds2j1.pdfIn PDF document text
    • http://siankaanmexico.com/vexokalad97q9p.pdfIn PDF document text
    • https://cdn.sqhk.co/gopuxipo/dkgeji3/maxi_jelly_shifter.pdfIn PDF document text
    • http://rorogudadusosej.getenjoyment.net/nipijudulakajujoremejokan.pdfIn PDF document text
    • http://skout.tech/bayalata_information_in_kannada6g0vo.pdfIn PDF document text
    • http://invitesistem.ru/boss_baby_girl_birthday_party_decorationsdibgq.pdfIn PDF document text
    • http://edayafar.xyz/uv-5r_vs_uv-5r_pluszdxkg.pdfIn PDF document text
    • http://apparentlyopt.com/can_i_convert_a_to_word_on_my_ipadqw217.pdfIn PDF document text
    • http://fonujameritules.getenjoyment.net/printable_binder_covers.pdfIn PDF document text
    • http://pokawibu.iblogger.org/ielts_writing_task_2_topics_academic.pdfIn PDF document text
    • https://cdn.sqhk.co/fusaduxuw/qjbEjjS/ridavibebuxosejikitivu.pdfIn PDF document text
    • https://cdn.sqhk.co/gabironero/vjihgjF/wosumu.pdfIn PDF document text
    • http://stassikorskyi.com/568040072223w23o.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fumutomuwe.epizy.com/best_microwave_hood_combo.pdfIn PDF document text
    • http://wekisuxizo.epizy.com/67284945067.pdfIn PDF document text
    • http://fanurumuge.epizy.com/79579109043.pdfIn PDF document text
    • http://fuwutowamig.myartsonline.com/bernt_oksendal_stochastic_differential_equations.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011bc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BC6 4916 bytes
SHA-256: b83897b5d69ea3c5ce051d7ddb2e378ad51f994fd2488a8a0b5c8002ff962cd3
font_01_sfnt_off00012c7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C7D 13640 bytes
SHA-256: f581e14a4b1fa81d2b738ca2778fd84174245ab147049ecb72d11da4a987502f

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