Malicious PDF — malware analysis report

Static analysis result for SHA-256 8466eee0d37a6329…

MALICIOUS

PDF

72.6 KB Created: 2021-03-29 10:09:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 26bc50bf90693750af6f8d37adff3b31 SHA-1: 8d73a4c3087c6fbdd8fb9cca5272796372f65c00 SHA-256: 8466eee0d37a63294b2893efb212a45f0ef9243cdf81921a273d0024ac2ed0bc
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically pointing to a domain associated with a link farm and disposable hosting, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly suggest malicious content. Although no scripts were explicitly extracted, the presence of numerous URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/wix?keyword=mega+man+4+password+generator PDF link annotation
    • http://finansi-7.online/zuretijosu1rhsx.pdfIn PDF document text
    • http://wolorafo.22web.org/python_3._4_for_windows_xp.pdfIn PDF document text
    • http://vikorurapufor.iblogger.org/94939215220.pdfIn PDF document text
    • http://jesibijifinuz.mywebcommunity.org/devazedizaxalezegazixopo.pdfIn PDF document text
    • http://pihodze.com/bunker_hill_security_camera_wireless_setup0yszh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://didabatok.epizy.com/losetegaruripu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d61cba5-e1ae-4db1-8f78-db757f0940cf/what_is_a_contract_law_definition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec275b5e-fcbe-4c96-a79a-c5fdcffec281/how_to_connect_xpress_m2070w_to_wifi.pdfIn PDF document text
    • http://fixujutupuwi.epizy.com/edexcel_a_level_biology_student_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a7d9b4c-0c7f-42f2-84a3-6799dff18e7a/how_do_i_use_fuzzy_lookup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fdc89c2-f211-4ad9-8ea5-33f1ea61bb9c/what_does_the_constitution_say_about_electoral_college_votes.pdfIn PDF document text
    • http://jenesigafepi.epizy.com/my_talking_angela_game_hack_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9512c1f-1d83-45dd-a754-72a996525786/webamukibamenuxitig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74a622f5-2970-4a8a-af73-6608b01baf18/nikon_coolpix_s9600_wifi_setup.pdfIn PDF document text
    • http://buzumigasox.myartsonline.com/zopuve.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_off0000dc2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC2E 5432 bytes
SHA-256: f95169e34b96ea3e3e19cb09974981fdd9a1d2ca3b69591889c6cb8b80b33815
font_01_sfnt_off0000eeb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB6 11524 bytes
SHA-256: 17d8b45ea47ba51e2aa16c4d45ffe53f9a56aee02eace11e0239724e40fbd92e

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