Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b014ec32499435d…

MALICIOUS

PDF

79.2 KB Created: 2021-03-04 00:27:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 29ee1d91f6a6737454b0f5b94f737dde SHA-1: 5ed97aa704db7522010d9b4989968794a807968b SHA-256: 4b014ec32499435dddb05d269a70eada7e8b9ce87bb1c586d62d05897d93ae8d
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://xezojetit.ru/123?utm_term=what+is+a+non+12+step+recovery+program PDF link annotation
    • http://busforpay.online/what_time_do_league_of_legends_patches_come_out6bqgn.pdfIn PDF document text
    • http://studyweb.site/catch_platform_in_construction2ocab.pdfIn PDF document text
    • http://argo-tourism.com/55066037314g8ldl.pdfIn PDF document text
    • http://jinokawobusuzi.iblogger.org/bassinet_sheet_set_big_w.pdfIn PDF document text
    • http://gifudevuf.iblogger.org/apics_certification_study_guide.pdfIn PDF document text
    • http://vejaginupivedez.iblogger.org/is_the_secrets_we_kept_based_on_a_true_story.pdfIn PDF document text
    • http://tiktokfrance.fun/683362034905ktg6.pdfIn PDF document text
    • http://zakewabo.scienceontheweb.net/mibegudabubib.pdfIn PDF document text
    • http://doctora.club/capitale_des_pays_africains6yvjo.pdfIn PDF document text
    • http://dazolovegom.mygamesonline.org/wd_tv_hd_media_player_firmware_upgrade.pdfIn PDF document text
    • http://7lessons.fun/xofizigotajifezereganiludh94s9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://joxupabazifo.rf.gd/company_folder_structure_template.pdfIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/sapovarudugolinasete.pdfIn PDF document text
    • http://bodegifu.atwebpages.com/calories_in_dunkin_mocha_swirl_pump.pdfIn PDF document text
    • http://sikejafomanama.epizy.com/78260036689.pdfIn PDF document text
    • http://razujefipuwix.rf.gd/is_there_a_white_belt_in_six_sigma.pdfIn PDF document text
    • http://zozikidifalov.epizy.com/99964566936.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e575.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE575 5676 bytes
SHA-256: 2da13b30d51b5af50fe771b3e8afef1b0d28e89f495c03948e0aa657de17d1ee
font_01_sfnt_off0000f8bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8BC 9832 bytes
SHA-256: 65e6ca6f9a2e7110fd74e6c662b9bc0020bec209e4d3c3c24754a63137215a94
font_02_sfnt_off00011ab4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AB4 16036 bytes
SHA-256: e5cfcb65454622883407fb93d4f5ec4274a84d253a07a77e3e12c2003349a76f