Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5036e2788085f7a…

MALICIOUS

PDF

78.1 KB Created: 2021-02-16 21:48:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c8a9f0109cf9908dffaaae9aa4f2ebb3 SHA-1: 3d3e95a099c0ccbef034483b387d8b626d02a129 SHA-256: e5036e2788085f7aee9ac2437c5fda840be817258bbba9bba629b2f04d5edceb
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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://baarspo.ru/strik?utm_term=how+to+read+a+person+like+a+book+review PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4380530/normal_601fe572be377.pdfIn PDF document text
    • http://1fps.ru/779424751045swqa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458145/normal_6011435d3553c.pdfIn PDF document text
    • http://bioforcecolumbia.site/coin_counter_locations_walmartcdnab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366652/normal_5ffa4179c80ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369762/normal_6011fa2f63418.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374704/normal_5fd0bbb2b5add.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490366/normal_5fccf431455b7.pdfIn PDF document text
    • http://skidki-day.shop/12851410467cvdrk.pdfIn PDF document text
    • http://cookwellbakewell.com/727598994557c640.pdfIn PDF document text
    • http://antonioit.fun/tecnologia_de_gruposbscfh.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484380/normal_6006590c47d33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366653/normal_5fd1451276200.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482629/normal_5fc57e3bd248c.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/jixerubowi/bihar_stet_previous_question_paper.pdfIn PDF document text
    • https://s3.amazonaws.com/pegozegi/vaxesaxakodo.pdfIn PDF document text
    • https://s3.amazonaws.com/jevelel/pokozimodaganokuxewidi.pdfIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/fleischner_society_2017_guidelines_radiopaedia.pdfIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/vpn_client_pro_patched_apk.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_off0000f1db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1DB 5272 bytes
SHA-256: 5e0d7c7d43e66e38b9ca25bd19b148a6a3d4911ffc02136259306cf21ad35547
font_01_sfnt_off000103de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103DE 12400 bytes
SHA-256: ec13c64fbc9587152284409e5d118f8327629fac2c16d9e2088bc3544abceabf

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