Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c01496eb97ec1b5…

MALICIOUS

PDF

78.2 KB Created: 2021-03-27 10:43:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 03560b2e3c2e6ad881ccf251dc75c240 SHA-1: 154afc033861e1962717863fc42ea2e33c52c31a SHA-256: 7c01496eb97ec1b570dc119849024c86742801362f55a7fc412fccd7877e09e6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://soxebez.ru/award?keyword=syllable+rules+pdf PDF link annotation
    • https://cdn.sqhk.co/jilebodetifa/cufgcOx/62643466005.pdfIn PDF document text
    • http://magexaxajatadog.getenjoyment.net/adobe_acrobat_reader_dc_download_free_viewer.pdfIn PDF document text
    • https://sosalikibagog.weebly.com/uploads/1/3/4/8/134856993/riganukodubop.pdfIn PDF document text
    • https://cdn.sqhk.co/tibidatoxo/Mfi9ja6/draw_puzzle_sketch_it_mod_apk_android_1.pdfIn PDF document text
    • http://metazoaapc.fun/1313432220jf87e.pdfIn PDF document text
    • https://xolufoxe.weebly.com/uploads/1/3/4/5/134501271/dikax-kuvemanun-bezadolekef.pdfIn PDF document text
    • http://ttop-shop.com/el_principe_maquiavelo_gredostnk7q.pdfIn PDF document text
    • http://takipleskazan.org/gartner_firewall_report_2019fbo70.pdfIn PDF document text
    • https://xewulatejema.weebly.com/uploads/1/3/5/3/135345986/tujadap_lazal.pdfIn PDF document text
    • http://mefazezotaw.22web.org/napivonavidizotumawukade.pdfIn PDF document text
    • http://fubikopelemom.mypressonline.com/anova_de_medidas_repetidas.pdfIn PDF document text
    • http://lamorebeduzakoj.22web.org/brucellosis_diagnosis_and_treatment.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://doduxukidomiro.epizy.com/linux_commands_for_aws.pdfIn PDF document text
    • http://lulufakek.epizy.com/40268079631.pdfIn PDF document text
    • http://fusozevukatamir.atwebpages.com/pagazuvo.pdfIn PDF document text
    • http://tarinag.epizy.com/look_back_in_anger_full_play.pdfIn PDF document text
    • http://benuniwutaferaz.epizy.com/lajobowobenufuku.pdfIn PDF document text
    • http://maretazijedoval.epizy.com/lubuwokisuketu.pdfIn PDF document text
    • http://nafakosoleg.epizy.com/french_present_tense_verb_conjugation_quiz.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_off0000f600.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF600 5380 bytes
SHA-256: 568f952abae977f55a6470320a75ee61cebf6276c5578703c893af3bf08cc3a1
font_01_sfnt_off0001085a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1085A 10568 bytes
SHA-256: 5cd1749eaba080e3de85281a701e60d0a9e2f6aed07247d27792eb56e56020b4

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