Malicious PDF — malware analysis report

Static analysis result for SHA-256 499fe90c6de1d880…

MALICIOUS

PDF

73.6 KB Created: 2021-03-31 00:54:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 6beb4c197844665a8c282592514cf718 SHA-1: d4d9112d84fe8275041cd117f72949f767b8438d SHA-256: 499fe90c6de1d8800f990ea788ff2eac097eb19d056f41e2f6d7d04464494d5b
126 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which host PDF files, suggesting a link farm or redirection mechanism. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of embedded URLs and the document's structure point towards an attempt to trick users into downloading further malicious content.

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
  • 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://resalured.ru/award?keyword=edit+scanned+pdf+documents+free PDF link annotation
    • http://wozovumorawoka.sportsontheweb.net/wowamasonemew.pdfIn PDF document text
    • https://cdn.sqhk.co/xaloridinef/aicoyBq/goxebusezowikobaz.pdfIn PDF document text
    • http://odebayitrafikhizmeti.com/what_constitutes_breach_of_trustoumul.pdfIn PDF document text
    • http://supernefritroller.xyz/zowerraw5o.pdfIn PDF document text
    • http://twobigs.space/android-_tools-_adb_ubuntu_16._04iquqt.pdfIn PDF document text
    • https://cdn.sqhk.co/vumusokutil/jiAhgha/48913350729.pdfIn PDF document text
    • http://xamawigokoke.mygamesonline.org/is_a_declaration_of_trust_valid_after_marriage.pdfIn PDF document text
    • https://cdn.sqhk.co/fulaxanew/0hdggih/suwolazekezefabe.pdfIn PDF document text
    • http://hookup673.site/13208702251uj1w2.pdfIn PDF document text
    • http://prizinsta.info/toro_21_inch_power_clear_e21_60v_review5f29y.pdfIn PDF document text
    • http://theporte.xyz/jogilusawagezave4iqo.pdfIn PDF document text
    • https://cdn.sqhk.co/merojuniv/tDigajd/pudding_monster_4-_19_3_stars.pdfIn PDF document text
    • https://cdn.sqhk.co/nuroteditu/cESVMid/47368914754.pdfIn PDF document text
    • http://car-den.ru/948052396sn812.pdfIn PDF document text
    • http://nyvelsets.online/exploration_mtg_borderlesscr6ex.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://seroritubofa.atwebpages.com/dubukobipajutavinasoke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21b499cd-d106-4ecd-9a88-20960a060de7/tagilupemumovunuxikusori.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03f4e02f-032a-46ca-a12a-438177155212/4219008163.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d0c1f50-8411-4983-838f-d7e8142baec5/pelelibe.pdfIn PDF document text
    • http://xawiwevivuzox.onlinewebshop.net/farulugenetigaja.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_off0000e384.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE384 5228 bytes
SHA-256: b8f242a279d852f4caed6938d159e37b53ede5fbac011ea065c996efb278e8f1
font_01_sfnt_off0000f53e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF53E 10608 bytes
SHA-256: 542f66a98df9584b00dea8fe682aeacaa2155cc7f609315578635a0e15851f64

Open this report in the interactive analyzer, or submit your own file for analysis.