Malicious PDF — malware analysis report

Static analysis result for SHA-256 6178456e5d53898b…

MALICIOUS

PDF

99.6 KB Created: 2021-05-04 11:42:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 9a091bb5ce8790c7b0d5d47b8ba8dc1d SHA-1: 225e3d86d4aeeaf25b4ab2fcf5b2f7d10c6c8511 SHA-256: 6178456e5d53898b89d99b50b62f1a5a82e2d8ccf55fd3abb451adf2eaba1b55
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to link farms hosted on disposable domains. The document body, though heavily obfuscated, appears to be a lure related to a search query, suggesting a phishing or scam attempt. The ML classifier strongly indicated maliciousness, and the overall structure points to a malicious PDF designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 4

  • 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://leonvi.ru/strik?utm_term=when+will+walmart+get+rid+of+cashiers PDF link annotation
    • https://cdn.sqhk.co/tajudozizif/himGOyn/zombie_road_racing_hack_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410018/normal_605fb5627d6b6.pdfIn PDF document text
    • http://fudasoba.iblogger.org/lista_de_verbos_regulares_e_irregulares_en_ingles_con_significado.pdfIn PDF document text
    • https://cdn.sqhk.co/nagebagem/DxjjWZ5/how_to_defeat_calamity_ganon_fire_form.pdfIn PDF document text
    • https://cdn.sqhk.co/dolafita/dV3jaig/myclassboard_login_indus.pdfIn PDF document text
    • http://hookup157.site/how_to_check_balance_on_regions_visa_gift_card_walmart7cia1.pdfIn PDF document text
    • http://fherixq.com/holy_anorexia_rudolph_belltbimx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409619/normal_6015e348de920.pdfIn PDF document text
    • http://nibelv.xyz/parallel_lines_transversals_and_algebra_worksheet_answer_key_gina_wilson9mwvo.pdfIn PDF document text
    • http://trikotoria.ru/how_to_connect_logitech_wireless_gamepad_f71009xj5.pdfIn PDF document text
    • http://bigowet.xyz/lakiwabuvopodedo4lngs.pdfIn PDF document text
    • http://xenuven.22web.org/breaking_into_wall_street_valuation.pdfIn PDF document text
    • http://nufapivevavenak.22web.org/leziwu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449965/normal_5ffc0aa1df744.pdfIn PDF document text
    • https://cdn.sqhk.co/vakanaju/jhjJjaI/chicken_invaders_3_online_play.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388819/normal_5fca99833a578.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://foripoj.epizy.com/kodovaxivakapufijudet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e9a6aa5-4c4a-4154-bfce-52a8db822075/bigoka.pdfIn PDF document text
    • http://fewanepuwigox.epizy.com/biggan_chinta_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/618c2670-caac-4b14-bbdb-37c0c11bc727/44525075335.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74e2562a-b338-4471-9faf-93679d662c66/jarudefikuroxir.pdfIn PDF document text
    • http://vagakidid.epizy.com/lurut.pdfIn PDF document text
    • http://befatig.epizy.com/present_past_and_past_participle_regular_verbs_list.pdfIn PDF document text
    • http://gitogopafo.epizy.com/15350896118.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013997.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13997 5328 bytes
SHA-256: bceab6e83829cd55059ba111e6f306827a5c061ebad9d4b4d1d762b94db09f54
font_01_sfnt_off00014b92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B92 11556 bytes
SHA-256: 3abb187af69b7a1af66b9dfcd1e85d0ba54ef268fc1f30305b5a7c4e0ad08fb5
font_02_sfnt_off000172cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x172CD 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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