Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fe01286379a6ab0…

MALICIOUS

PDF

74.4 KB Created: 2021-03-23 08:55:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 5cfcc1e21d1776ea5d7c39d109635590 SHA-1: eddf75d425177369a03094aa246cfb871291b052 SHA-256: 5fe01286379a6ab0d29c286c99f6b91d74a216adf2476448ed683a65a5dc79ba
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains a large number of external links to various PDF documents hosted on disposable domains, indicative of a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. The embedded URLs and the structure of the document point towards an attempt to manipulate search engine results or lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://midufefew.ru/123?utm_term=warrior+cat+games+online+free+no PDF link annotation
    • https://jagusidenoz.weebly.com/uploads/1/3/4/9/134902343/pukiworifafunes_dugewime_xuzolis_samol.pdfIn PDF document text
    • https://sezitekiporav.weebly.com/uploads/1/3/4/6/134627959/kazafonuvazu_wukowefaxuv_peluzazuje.pdfIn PDF document text
    • https://luvokivimowef.weebly.com/uploads/1/3/1/6/131607407/4721a56.pdfIn PDF document text
    • http://kivabixedopat.22web.org/piwagaxeb.pdfIn PDF document text
    • http://gepuladetageton.22web.org/wasezivaxuriras.pdfIn PDF document text
    • http://dompodklyuch.com/37392650159tyh0b.pdfIn PDF document text
    • https://pilolekolaf.weebly.com/uploads/1/3/4/6/134655903/xiximuxete.pdfIn PDF document text
    • https://tedovuja.weebly.com/uploads/1/3/4/4/134465286/pitamodovafuluvomir.pdfIn PDF document text
    • https://lusovajilabijix.weebly.com/uploads/1/3/5/3/135351537/kukod.pdfIn PDF document text
    • http://8bitbeardsco.com/tijogojegqt4oj.pdfIn PDF document text
    • https://dimegowogox.weebly.com/uploads/1/3/3/9/133999821/gavomosononi_zejiluga_liriza.pdfIn PDF document text
    • http://siondez.ru/ninja_warrior_legend_of_shadow_hack_game_downloadhfxru.pdfIn PDF document text
    • http://wurogutevifo.iblogger.org/zulilidemafikuxek.pdfIn PDF document text
    • http://dfds.in/canon_2900b_printer_softwarecgd4d.pdfIn PDF document text
    • https://xavamukunakupa.weebly.com/uploads/1/3/1/4/131437969/jusuruvida.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zusevamasor/deus_ex_mankind_divided_best_ending_guide.pdfIn PDF document text
    • http://befejuzawafuv.epizy.com/what_is_my_deepest_fear_poem.pdfIn PDF document text
    • https://s3.amazonaws.com/tenunud/dynamic_mapping_template_elasticsearch.pdfIn PDF document text
    • https://562c2315-396f-49d1-9e45-1236e049cb13.filesusr.com/ugd/ec0012_2a016d212f33445ca7e1183ddd0e4628.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pokorevalaxex/axis_mutual_fund_nomination_updation_form.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/76446588703.pdfIn PDF document text
    • https://254b3b0b-79dc-4992-827c-fd4bb3db3178.filesusr.com/ugd/f515ca_5b310c5c5e6842ebbf041be92889dcb5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ziwuvijevo/99595322256.pdfIn PDF document text
    • https://662517ce-f374-4037-aebd-99b1dbe00103.filesusr.com/ugd/0c4177_4e3a92e089a44400b0b0e4a9ab09a2ca.pdf?index=trueIn PDF document text
    • https://700ceb37-22d2-47c5-9888-d858af679aee.filesusr.com/ugd/c345b0_113a42d87fae4514ba127e6a10c81aa7.pdf?index=trueIn PDF document text
    • http://denisilexi.rf.gd/6462356360.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_off0000e8e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E6 5216 bytes
SHA-256: 298b7752b24b2028da1b935234bc4909373e0979fe6de2fe32424e692d8e8d2c
font_01_sfnt_off0000fa9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA9E 9768 bytes
SHA-256: ba98163d910e9c86caa91a04f4139ff4da54cb8bddef1c9b2915acebedc32759

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