Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dc49ff1a2021e55…

MALICIOUS

PDF

79.7 KB Created: 2021-06-01 06:13:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb3d02b295dfc06b8c35aae5049f403a SHA-1: 333892c857af433fa6934cae2cb7195b4becccfe SHA-256: 4dc49ff1a2021e5576253df1e8dc0e24577205b4af80a716a063eba44e6e91fd
126 Risk Score

Malware Insights

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

This PDF was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, with one at https://garglob.ru/pbw?utm_term=does+ray+actually+die+in+the+promised+neverland being particularly suspicious due to its UTM parameters and disposable hosting. The document body is heavily obfuscated, but the presence of external URIs and the link farm heuristic suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://garglob.ru/pbw?utm_term=does+ray+actually+die+in+the+promised+neverland
    • https://mozejoli.weebly.com/uploads/1/3/4/8/134864480/nupokugar.pdf
    • https://mogijoduvide.weebly.com/uploads/1/3/0/8/130814471/9687a4.pdf
    • https://guvorike.weebly.com/uploads/1/3/4/2/134266232/09c608593541.pdf
    • https://nozitobolilijaz.weebly.com/uploads/1/3/4/4/134473425/7736847.pdf
    • https://fedubipogumuwu.weebly.com/uploads/1/3/1/3/131379546/buwoluvu.pdf
    • https://ratilobavet.weebly.com/uploads/1/3/1/8/131858747/xorom_kukele_rumowi_kevudi.pdf
    • https://zuriloteva.weebly.com/uploads/1/3/4/6/134623588/gonukuzumenexom.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://nilanom.pbworks.com/w/file/fetch/144427788/how_do_you_light_a_pilot_light_on_a_baxi_boiler.pdf
    • http://tukufidanega.pbworks.com/w/file/fetch/144426099/madras_university_arrear_exam_hall_ticket_april_2021.pdf
    • http://taxexuwej.pbworks.com/w/file/fetch/144432372/bloons_tower_defense_5_flash.pdf
    • https://uploads.strikinglycdn.com/files/2a8be6fd-6744-40c4-872e-755669877643/83486669916.pdf
    • http://bovozajezo.pbworks.com/w/file/fetch/144441108/99879888481.pdf
    • http://bofamawetodo.pbworks.com/f/que_significa_sonhar_com_a_cara_desserto.pdf
    • http://banusiv.pbworks.com/f/are_repos_public_record.pdf
    • http://poxanoralanu.pbworks.com/f/punchline_algebra_book_b_answer_key_quadratic_equations_and_functions.pdf
    • http://dibesusajob.pbworks.com/w/file/fetch/144440772/taporuwotowumuravi.pdf
    • https://uploads.strikinglycdn.com/files/3dfff95a-2ca4-4748-acb5-d45af2b27450/dusex.pdf
    • http://lekuzax.pbworks.com/f/ejercicios_de_matematicas_para_segundo_grado_de_secundaria_resueltos.pdf
    • http://lijegazoz.pbworks.com/w/file/fetch/144417252/pujexifanewonemivorefefoz.pdf
    • http://siwuromo.pbworks.com/w/file/fetch/144424752/how_to_mount_a_badland_winch.pdf
    • http://xuruzinijub.pbworks.com/f/14203003466.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f816.bin
b24b71309f3c80a728ee8120126369709c96958cf997b4f6d23b6c87eef36eaf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF816 5472 bytes
font_01_sfnt_off00010a98.bin
1302f5550b7f34d3bfb979bcf94ad7e34fce6f00d02be3463629c657afe63961		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A98 11256 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.