Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7fe4415d8ae331b…

MALICIOUS

PDF

71.0 KB Created: 2021-01-25 12:45:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 22a867c4e20c7c14f85ac9d9b7726cf8 SHA-1: 123595b219c62991e29554e081f74ae82a1eeb09 SHA-256: a7fe4415d8ae331be9624e3f3afc2680dfe7feb265cc2e08e17d51c0d72826dc
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wb?keyword=police%20car%20chases%202019 In PDF document text
    • http://sellforce.ru/sibezedkvr4.pdfIn PDF document text
    • http://mini-cam1.club/free_dating_websites_and_apps7a0yt.pdfIn PDF document text
    • http://profaudit32.ru/biruxaxenafujuwitali9b1zp.pdfIn PDF document text
    • http://cherrypimp.online/vomajaluwokilemewinevibarp9es7.pdfIn PDF document text
    • http://hookup154.site/7049938505334tj.pdfIn PDF document text
    • http://vofovadero.22web.org/dimple_dies_for_sheet_metal_uk.pdfIn PDF document text
    • http://stebsmeh.space/bangla_to_english_dictionary_offline_apkpnn8p.pdfIn PDF document text
    • http://baxemoge.iblogger.org/vozosejaxunazajexipi.pdfIn PDF document text
    • https://nesibebinirudeb.weebly.com/uploads/1/3/5/3/135311353/8646927.pdfIn PDF document text
    • http://lojotiwutorolad.22web.org/gedut.pdfIn PDF document text
    • http://csxmoney.info/head_basketball_game_2_player4fmky.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/gixirojozogufux/bose_soundlink_micro_bluetooth_manual.pdfIn PDF document text
    • http://dekifovep.epizy.com/fikikafivatoroset.pdfIn PDF document text
    • http://wekujugom.epizy.com/mortgage_broker_fee_agreement_form.pdfIn PDF document text
    • http://kixixiwibatogit.epizy.com/34289235993.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_off0000da3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA3F 5372 bytes
SHA-256: 8f3d273713bc1742c9560c061f51b15bd1ef5ebe74fd8272fbc2ba35d7c15151
font_01_sfnt_off0000ec78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC78 10224 bytes
SHA-256: caa2d9265514048cb3bb24886c2141278ce0952f39e7aa63af14015a7f1a536b