Malicious PDF — malware analysis report

Static analysis result for SHA-256 89bd5d0435e780a5…

MALICIOUS

PDF

75.0 KB Created: 2021-03-18 07:54:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: befc80f6123527c51c5ec9622bb31ab8 SHA-1: 53b379339aed3804d9af5142cd7943b6ad91a3a9 SHA-256: 89bd5d0435e780a58e185b3f1b2075bc13a1866ddd217f7a5e5a4269adf5e451
186 Risk Score

Malware Insights

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

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 0.9996

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://crophysi.ru/wix?keyword=best+vehicle+for+hill+climb+racing+2 PDF link annotation
    • https://wifaborasumekig.weebly.com/uploads/1/3/2/6/132695644/wofoxadefu-xaguvezowafapub.pdfIn PDF document text
    • https://zikivunebek.weebly.com/uploads/1/3/5/9/135964247/8185849.pdfIn PDF document text
    • http://kogavegafekaw.22web.org/28858996571.pdfIn PDF document text
    • http://twitter-center.com/how_to_calculate_oxygen_flow_ratervqpd.pdfIn PDF document text
    • https://watorixaziju.weebly.com/uploads/1/3/4/5/134586039/309581.pdfIn PDF document text
    • http://bettermoneytips.com/lagovomevuzo3b.pdfIn PDF document text
    • https://xuwupeloz.weebly.com/uploads/1/3/4/7/134734270/jegikejiviwufuxu.pdfIn PDF document text
    • https://rikelakejif.weebly.com/uploads/1/3/4/8/134885243/rebixem.pdfIn PDF document text
    • https://simiwulizolur.weebly.com/uploads/1/3/1/4/131455232/xivoxokoseku.pdfIn PDF document text
    • http://zeridojatis.iblogger.org/business_model_innovation_the_organizational_dimension.pdfIn PDF document text
    • https://vesukinixemijuw.weebly.com/uploads/1/3/2/6/132696016/texarejotux.pdfIn PDF document text
    • http://tipografiyav.moscow/operations_management_jobs_jacksonville_flctnzm.pdfIn PDF document text
    • https://vogovolakufa.weebly.com/uploads/1/3/4/8/134874318/dovizejitatikenife.pdfIn PDF document text
    • http://vanlit.ru/674200612361o9xo.pdfIn PDF document text
    • http://pajalegi.iblogger.org/ata_guidelines_thyroid_nodules.pdfIn PDF document text
    • https://komipakokituk.weebly.com/uploads/1/3/5/9/135993761/boxidopasifefozew.pdfIn PDF document text
    • http://the-job.ru/psychic_intelligence_free_downloadkysk5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zunebodiz.epizy.com/champions_league_anthem_sheet_music_violin.pdfIn PDF document text
    • https://s3.amazonaws.com/zolerazowubow/62756936684.pdfIn PDF document text
    • https://s3.amazonaws.com/lekelepowo/19307449995.pdfIn PDF document text
    • http://tixigidix.epizy.com/how_to_get_hp_deskjet_3630_wifi_password.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/denifipoz.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_off0000e6be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6BE 5676 bytes
SHA-256: 6035adc20cecdd4b1ae53f59be4e8d0ae6cf35aa12d44100a13e9067afcddbdf
font_01_sfnt_off0000f9f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F1 10804 bytes
SHA-256: 7ce4b92c8db1db24b6c2bf7249c1ca30d54c63cf0dc5997fdc584d6a3b6dfcc0

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