Malicious PDF — malware analysis report

Static analysis result for SHA-256 09e961facf207a24…

MALICIOUS

PDF

78.3 KB Created: 2021-04-20 15:47:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2cd399083dfec17bc0316814a1799919 SHA-1: 851f1168d2f7c25caadfd37715de8d7135233fee SHA-256: 09e961facf207a2452b3b693c7748bbdf6531bc7fa09844c63f9bd3ccccf2111
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://xajibur.ru/strik?utm_term=lowes+application+form PDF link annotation
    • http://detubogoxugovub.22web.org/xudizunokinege.pdfIn PDF document text
    • http://laluwaraselolar.mywebcommunity.org/iso_ts_16949_version_2002.pdfIn PDF document text
    • http://kigumelez.medianewsonline.com/52191956512.pdfIn PDF document text
    • http://xemokajoled.medianewsonline.com/bajizagiwadibesuf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d87265a-b52c-4ad3-82b8-9e41e3f31984/7944196401.pdfIn PDF document text
    • http://daxokefi.epizy.com/einfache_lineare_gleichungen_aufgaben.pdfIn PDF document text
    • http://kosatalek.rf.gd/delegation_definition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b6168b8-4ddf-4b42-9dfb-82cbd55384b0/futiwawuwedadovok.pdfIn PDF document text
    • https://s3.amazonaws.com/zabejuvijolu/87417787777.pdfIn PDF document text
    • http://kojenixerog.myartsonline.com/fafefuvepapedofipodetep.pdfIn PDF document text
    • http://tuzawuza.epizy.com/omron_5_seriestm_upper_arm_blood_pressure_monitor_-_bp742n.pdfIn PDF document text
    • http://dezobod.onlinewebshop.net/solving_algebraic_equation.pdfIn PDF document text
    • http://zuxulabawiba.rf.gd/15479736921.pdfIn PDF document text
    • http://kinadawefenipe.rf.gd/absorption_and_marginal_costing_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/offshore_fishing_report_corpus_christi_texas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cb3ab9b-1b15-4fbf-87c7-0c99c1de3e6c/toyota_camry_maintenance_required_light_flashing.pdfIn PDF document text
    • https://s3.amazonaws.com/fulazelof/jerat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/509b22d5-06de-40ae-bc16-85ba540f60cf/what_does_cognitive_perspective_mean_in_psychology.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_off0000f355.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF355 5192 bytes
SHA-256: 7d3c343171e6ccfb9cff90c17664fb9cd120ec574e3e54aa5cfe47207a2f89bd
font_01_sfnt_off00010506.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10506 11080 bytes
SHA-256: 4479497b2602ee6553f5a66551940afafeb029a2d428aaf2e7c5292d7eb676bb

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