Malicious PDF — malware analysis report

Static analysis result for SHA-256 683e18528283652b…

MALICIOUS

PDF

63.7 KB Created: 2021-02-13 05:41:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 8862eadfe43c87adad58098dfee6f430 SHA-1: b23d5211733f87cd3db8bf1d051d200edb8d234e SHA-256: 683e18528283652bbf0987fee72f259c7997d746d1c42614df37688c57ee904d
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/123?utm_term=doodle+god+cheats+save+the+princess In PDF document text
    • http://good-production17.site/fegubimodegiteronikuzecqan0.pdfIn PDF document text
    • http://7gusevshop.website/asymptomatic_carotid_artery_stenosis_guidelinesmoe8j.pdfIn PDF document text
    • http://jeweboz.iblogger.org/razizefezowatedefuse.pdfIn PDF document text
    • http://trylait.club/hp_rdx_utility_softwarewfiez.pdfIn PDF document text
    • http://fabulouss.space/zipukiguxadogamu2f42l.pdfIn PDF document text
    • http://republvinb.fun/aksara_sunda_lengkapqleyl.pdfIn PDF document text
    • http://buyervannakupitvsem.xyz/rexapisisajvo6b.pdfIn PDF document text
    • http://qrettalq.online/metabolism_of_lipids_biochemistrylqfv3.pdfIn PDF document text
    • http://whysmall.space/dedaxevixesezujatesubix594a5.pdfIn PDF document text
    • http://berkeciftci.net/3758987270649kb4.pdfIn PDF document text
    • http://jogubewuzamofet.iblogger.org/guided_by_voices_sweating_the_plague_lyrics.pdfIn PDF document text
    • https://pulolated.weebly.com/uploads/1/3/0/7/130740140/guxudomebowepanumoli.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://moliposapivar.epizy.com/english_tagalog_dictionary_free_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/fupanabivote/goginugirikuseberuromopof.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/27523138268.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_off0000bbfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBFB 5396 bytes
SHA-256: 2b21117762e5b322cb64a28d1a6aabdeae02de43f2e1493aa776b4a09080347e
font_01_sfnt_off0000ce5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE5B 10448 bytes
SHA-256: b3abe4aab5aefef98e6f40428d1792dedbf4287d58e7340bb40f23e8715eb4e1