Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ac378a3acde1f52…

MALICIOUS

PDF

93.6 KB Created: 2021-04-01 07:22:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 8e79742e63779e977b7088accf8c7e92 SHA-1: d60e7b1f895421857777d6c557be12a9c200a82f SHA-256: 1ac378a3acde1f52c9acf98be8326f2104b73aa2ebf661a3880719d57ec787f9
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, with a high risk score. It contains an embedded URI pointing to 'fokemale.ru', which is likely part of a phishing or malware distribution scheme. The PDF's structure and embedded links suggest it's designed to act as a link farm, directing users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://fokemale.ru/award?keyword=astrology+science+or+superstition+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4498997/normal_6037a8c46ebc7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459785/normal_604d0cb76bb49.pdfIn PDF document text
    • https://cdn.sqhk.co/puzadowoke/KjwnifM/ice_cream_shops_that_deliver.pdfIn PDF document text
    • http://wipebodu.mypressonline.com/badotoberuxupemelujipawa.pdfIn PDF document text
    • https://cdn.sqhk.co/lumolixuwo/5lh7aZH/xejawonukanozaxuzi.pdfIn PDF document text
    • https://cdn.sqhk.co/xawefigi/Adgjgf9/wd_cloud_app_for_windows_10.pdfIn PDF document text
    • http://jekenufakewe.mypressonline.com/nivupifofogazobozolo.pdfIn PDF document text
    • http://pifovabu.getenjoyment.net/71997313895.pdfIn PDF document text
    • http://kikaxefe.22web.org/ejercicios_de_matematicas_1_eso_estadistica_y_probabilidad.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuperik/cjiWgj3/73930683690.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://resegubus.rf.gd/jerizajila.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0446d003-3bc8-40b3-a077-bdc09bb9ef5f/zagg_keyboard_not_connecting.pdfIn PDF document text
    • http://xedawobu.atwebpages.com/dagir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b65a8c7-5729-41cc-8830-b60bbbf7b494/commodore_64_football_games_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0fef353-58b7-4ac2-a572-a4d16f6f1f04/how_to_find_pin_for_bluetooth_keyboard.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/aditi_bhatia_song.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/52950421653.pdfIn PDF document text
    • http://bumurulepowele.myartsonline.com/78481805432.pdfIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/disable_bloatware_apk.pdfIn PDF document text
    • http://kudetewususitup.rf.gd/prentice_hall_pre_algebra_online_textbook.pdfIn PDF document text
    • http://biwufedizew.rf.gd/152414628.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eeba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBA 5204 bytes
SHA-256: 53faad4688cbefd0577f60e8ae2b3215a3ad3b481786a5d61e05ffcedb97a7c0
font_01_sfnt_off00010089.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10089 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off00010917.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10917 11412 bytes
SHA-256: 96e94e66cd57b2563261420e0736b6babfc04822ae8f1ca61b819f7259cb6ad0
font_03_sfnt_off00013023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13023 16144 bytes
SHA-256: 18f56b7fae04e07bc119a468ad323bdda099da77b0772854d1c47cc1f39b9f3b
font_04_sfnt_off0001455f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1455F 9988 bytes
SHA-256: 443469ed0caf237815cd2837ce680e86202c2d9e3930cf9dc00420141511070d