Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe84f448b771eb86…

MALICIOUS

PDF

92.6 KB Created: 2021-03-11 23:24:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: a45fb762d61e6e5e0b64302f8d161742 SHA-1: 13f4d9ec50339444dfad572f718afa050554b5e3 SHA-256: fe84f448b771eb86d4bdf671194b3b5b24f59267db339257e0e876f4fa45ee7b
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, with a primary focus on directing users to potentially malicious domains like mezovuduw.ru, disguised with keywords related to online games. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests a tactic of using disposable hosting to obscure the true malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mezovuduw.ru/wix?keyword=papa%2527s+pizzeria+games+free+online PDF link annotation
    • https://pezilesuwubev.weebly.com/uploads/1/3/4/6/134639222/rujajipifuzo.pdfIn PDF document text
    • http://bewujasixi.mywebcommunity.org/chili_s_restaurant_menu.pdfIn PDF document text
    • http://lnstagramcentre.net/mathematics_test_answers1g0xp.pdfIn PDF document text
    • http://maska-respirator.com/biology_book_in_bengali_version_class_12dxt91.pdfIn PDF document text
    • https://cdn.sqhk.co/xudevekelefe/cAYcoZY/vasaju.pdfIn PDF document text
    • http://zokidinodajives.getenjoyment.net/vishnu_sahasranamam_1008_names_in_gujarati.pdfIn PDF document text
    • http://sidufapas.mywebcommunity.org/can_i_rent_an_apartment_without_a_lease.pdfIn PDF document text
    • http://goladelexugezi.sportsontheweb.net/xawibaso.pdfIn PDF document text
    • https://cdn.sqhk.co/pibegufuxova/jMgvjb4/40031166261.pdfIn PDF document text
    • http://ogranicbio.space/metal_gear_solid_4_ps4_cheats5qb2f.pdfIn PDF document text
    • http://arthromedshop.xyz/befogo0w4lu.pdfIn PDF document text
    • http://kerutugizuxig.mygamesonline.org/spoken_english_software_for_windows_7.pdfIn PDF document text
    • http://begdas.space/can_you_be_a_cashier_at_walmart_at_16bmcll.pdfIn PDF document text
    • https://manasuma.weebly.com/uploads/1/3/0/8/130873954/bovaf.pdfIn PDF document text
    • https://dobamadolexazi.weebly.com/uploads/1/3/4/4/134478964/zegifule.pdfIn PDF document text
    • http://saduzemed.mypressonline.com/22739590722.pdfIn PDF document text
    • https://kozewofedira.weebly.com/uploads/1/3/4/8/134899359/7444795.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/2fbe909f-e676-41c5-b503-951dbd37189f/sorutulofevajadeta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8cb1424-1242-4341-a092-070dfd425bf5/biomedical_engineering_bridging_medicine_and_technology_download.pdfIn PDF document text
    • http://xekabotiwuker.atwebpages.com/49249574688.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4699c149-4c09-4a34-9fad-2337b64fe704/miwakuxufanapusomamutuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f310af4-fccf-4c73-a8ce-acfd1002ea29/john_deere_trs21_parts_diagram.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00013598.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x13598 25468 bytes
SHA-256: 961dca2feb2438e59d05deedb502a344da51a1824f1135ea7b62e7db9ff3e91f
font_00_sfnt_off00010113.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10113 5308 bytes
SHA-256: b0255a0c5ef6b74651979c349d930928f2ffd22aa54801db0d4e73a4b68bfbe5
font_01_sfnt_off0001131a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1131A 10000 bytes
SHA-256: cdceff7306f7dd059cafe56be2db3fcc98694929d370e3ca0b9b8a8f9da98afb