Malicious PDF — malware analysis report

Static analysis result for SHA-256 54cc5200feaaf934…

MALICIOUS

PDF

87.2 KB Created: 2021-04-05 07:51:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 54613203bba4412c9a6ddc4e057d7bd1 SHA-1: b36962ab4286071c9caa29560d4021ef4f4a0e29 SHA-256: 54cc5200feaaf9349ef9b56688c7e7ef35c96082b03e3a2bcb2704682e1a90d1
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, with a high concentration on disposable hosting, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of an attempt to redirect users to malicious sites.

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://jacksth.ru/wix?keyword=we+wear+the+mask+lesson+plan PDF link annotation
    • http://basikoz.iblogger.org/what_is_social_mapping.pdfIn PDF document text
    • http://ketaton.mywebcommunity.org/java_swing_radio_button_group_change_listener.pdfIn PDF document text
    • http://lewuvumo.sportsontheweb.net/statistical_methods_for_psychology_download.pdfIn PDF document text
    • http://zekinaperobivak.22web.org/lepusetasimavejafi.pdfIn PDF document text
    • http://lunagogafoxoj.sportsontheweb.net/10250787710.pdfIn PDF document text
    • http://tajevis.22web.org/mad_max_ps4_trophy_guide.pdfIn PDF document text
    • http://mufutekuson.getenjoyment.net/emil_and_the_detectives_movie_cast.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/d653d37e-eb5f-4e86-b646-beea9bbc57c3/brownie_badge_requirements_household_elf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70be3d67-1216-4c73-b1ec-bdbec68b021b/merchant_of_venice_act_5_scene_1_solved_textbook.pdfIn PDF document text
    • http://zerowegujij.onlinewebshop.net/23131060692.pdfIn PDF document text
    • http://kagufunoziwezu.epizy.com/37605133682.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2c8ee3b-e965-4c7b-8f7c-332b6fdbf50e/introduction_to_data_science_rafael_a._irizarry_solutions.pdfIn PDF document text
    • http://gonefuxirazu.rf.gd/free_powerpoint_award_certificate_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20d62c84-7109-490b-b81e-3bc0c76e8204/ice_cream_makers_recommended.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c23c18a2-dddf-43bb-a3f0-404d2dca8f43/82809704922.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ef03338-c4cb-477b-83e3-284b7336eb0c/95180111627.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b673f73e-5f16-45e9-bda8-d06170b934d1/how_to_setup_tl-wr841n_as_repeater.pdfIn PDF document text
    • http://vekujekodabudu.epizy.com/luvebefifevufemadako.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_off00011793.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11793 5228 bytes
SHA-256: 2355d2dc4320494a46d5a0fdb671adfcf42c89c619df35ecf8ba87548b89e4c0
font_01_sfnt_off00012943.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12943 10760 bytes
SHA-256: 7c53dbbe3d1a50134151e3996e6b7338966942b98eab5c3f504ed6664348d24e

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