Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebaa49b74a96848f…

MALICIOUS

PDF

77.2 KB Created: 2021-03-15 18:45:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: e0f4f2aef43c99a4edc00ed7e217ef2b SHA-1: 5bcce931775a319fc2dd2e66e9b94111b8036b71 SHA-256: ebaa49b74a96848fefb9aab91b10afd70b577be14e3526a8fcd850202c92a0c7
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of an external URI pointing to 'vilenefex.ru' suggests the document is designed to redirect users to a potentially harmful site. Although no scripts were extracted, the PDF structure and embedded URI are strong indicators of a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://vilenefex.ru/wix?keyword=%25D7%2594%25D7%2590%25D7%2597+%25D7%2594%25D7%2592%25D7%2593%25D7%2595%25D7%259C+%25D7%25A2%25D7%2595%25D7%25A0%25D7%2594+7+%25D7%25A4%25D7%25A8%25D7%25A7+17+%25D7%2594%25D7%259E%25D7%259C%25D7%2590 PDF link annotation
    • https://cdn.sqhk.co/rujosupatebu/atie1T0/gizesejisoledirajizu.pdfIn PDF document text
    • https://cdn.sqhk.co/goworonol/Vhhkihu/34767382474.pdfIn PDF document text
    • https://cdn.sqhk.co/rabataxuvax/iaicVpb/my_talking_tom_online_play_in_jio_phone.pdfIn PDF document text
    • https://cdn.sqhk.co/jokawefezo/izSgiZX/zirozojisoroliruv.pdfIn PDF document text
    • https://cdn.sqhk.co/mafowixodi/Xibijdv/hill_climb_racing_2_wiki_deutsch.pdfIn PDF document text
    • http://lukukitufegaxib.22web.org/skyrim_smithing_enchanting_alchemy_exploit_guide.pdfIn PDF document text
    • http://gesabagipo.22web.org/l_t_finance_annual_report_2018.pdfIn PDF document text
    • https://cdn.sqhk.co/gasupewu/Bihbge8/battle_arena_toshinden_gameboy.pdfIn PDF document text
    • https://cdn.sqhk.co/lojenozasila/ijgQVhd/69005274429.pdfIn PDF document text
    • https://cdn.sqhk.co/rarukaboz/hewhe38/gezere.pdfIn PDF document text
    • http://bulakirip.getenjoyment.net/swagger_tutorial_for_beginners.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/5ca67dd8-b7d9-4f1c-9674-ad864ce5d14e/yiruma_river_flows_in_you_keyboard_chords.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/142069e4-cdcd-4183-9b91-b2d253fb9a3a/job_interview_questions_tell_me_a_little_about_yourself.pdfIn PDF document text
    • http://sovogezo.atwebpages.com/acer_aspire_n1996_motherboard_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e7aa8d6-a20d-4d3e-a17b-ccf64cac89e5/what_is_nanami_togarashi.pdfIn PDF document text
    • http://buketoxepebaf.epizy.com/xobezav.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/how_to_reset_parrot_bluetooth_car_kit.pdfIn PDF document text
    • https://s3.amazonaws.com/fowonaxul/video_er_ultimate_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57849fa7-d341-42d3-b4fb-1c4f4e5ba6e2/fall_of_the_house_of_usher_quiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf75535b-d884-40de-95f3-030fe24ddf93/sefepavilisunel.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_off0000e99d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE99D 5260 bytes
SHA-256: 70210d85bca5cc538b984045587d0f2adfa18776967e4baf1abec47b032e857d
font_01_sfnt_off0000fbf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF0 12012 bytes
SHA-256: b42b97e2fb05b199e0830160251ab642f40fffed9a56302cfa809279adba1929

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