Malicious PDF — malware analysis report

Static analysis result for SHA-256 1008c05ec3a6664f…

MALICIOUS

PDF

81.7 KB Created: 2021-03-22 17:41:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e9abb47c884a26820eec9d77d35eae82 SHA-1: e68f77b37c91ec71058e52fa23ce9dc38b1667f1 SHA-256: 1008c05ec3a6664fb912b413c6b2291651218a8a4166c083bc38e84b1ba113be
166 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs, with one prominently featuring "tyranitar raid guide" in its path, suggesting a lure. The heuristic firings indicate it's a link farm on disposable hosting and that the PDF itself is flagged as malicious by ML classifiers and ClamAV. The presence of a "Password-protected archive handoff" heuristic suggests the document is intended to trick the user into providing a password to decrypt a malicious payload, likely delivered via one of the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://zajinet.ru/wix?keyword=tyranitar+raid+guide
    • http://rojenugilin.22web.org/a_game_fitness_and_performance.pdf
    • http://healthytrands.com/71535031403w03o9.pdf
    • https://warevinigipa.weebly.com/uploads/1/3/4/8/134898994/roguj_rajuzogo_julurarap_xorodugasoxa.pdf
    • http://kewatupu.scienceontheweb.net/ley_federal_de_titulos_y_operaciones_de_credito_pagare.pdf
    • http://simcars.ru/92114438373czse.pdf
    • http://fajutixosisi.22web.org/apache_commons_net_api_jar.pdf
    • http://koxuliziva.iblogger.org/laxesagojumovotudata.pdf
    • http://wikowezenitezo.medianewsonline.com/the_rock_cycle_worksheet.pdf
    • http://tuzogat.sportsontheweb.net/carotenoids_review.pdf
    • https://bipuwuvi.weebly.com/uploads/1/3/0/7/130776795/6948137.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://rupesujutiwu.myartsonline.com/82948461989.pdf
    • http://kagijido.myartsonline.com/munakofosajovipinoxa.pdf
    • https://uploads.strikinglycdn.com/files/d33d5045-765d-40c2-9edf-cd4c1d077f4c/15600476419.pdf
    • http://nabulegewuwal.myartsonline.com/masters_industrial_systems_engineering_salary.pdf
    • https://uploads.strikinglycdn.com/files/87b022d1-938e-4f3b-b122-bb23b4c5685d/what_is_the_origin_of_species_summary.pdf
    • http://tasefabomodewiv.epizy.com/menagerie_weapons_sheet.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec31.bin
441c2695080cfdf9483cdf6f1263a527fdf34db05d303d9b078dd2a68efbb589		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC31 4832 bytes
font_01_sfnt_off0000fcb9.bin
5a3e731c9d12ab78627e70513bf588251e483a16205e1b624a26bbd90df7d7d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB9 11504 bytes
font_02_sfnt_off000123b4.bin
bb4620ae2308066493f479cb0495314a41e91f5b0bfb2a754d9bad2ef34af03d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x123B4 16060 bytes

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