Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f272599aa807d79…

MALICIOUS

PDF

77.7 KB Created: 2021-03-09 21:32:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 35950ab222a2cdb028ff0bee3bb4ebb6 SHA-1: d2cf0bd42c8d359c1b67b1b34e1ff881301942da SHA-256: 6f272599aa807d7940cfd34178f94562fa9e29e91466a3c67d00012dd10097ca
156 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 0.9989

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 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.
  • 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://golowaki.ru/strik?utm_term=what+foods+are+more+alkaline PDF link annotation
    • http://bigno.space/what_is_audit_committee_in_corporate_governancenyrwn.pdfIn PDF document text
    • http://yildirimotobursa.com/manual_de_organizacin_y_procedimientos_del_procet20mf0.pdfIn PDF document text
    • https://wipigoxexidon.weebly.com/uploads/1/3/2/6/132682030/busofuxibob-lajadoku.pdfIn PDF document text
    • http://zutelotojenexop.getenjoyment.net/resumen_del_libro_un_mundo_feliz_de_aldous_huxley.pdfIn PDF document text
    • http://xenalebosob.scienceontheweb.net/43621109437.pdfIn PDF document text
    • https://mezamavizasiv.weebly.com/uploads/1/3/5/3/135312133/tukevokujes_tomado_toditiguxamof.pdfIn PDF document text
    • http://acgmgroup.ru/bc_hunting_app_androidrjday.pdfIn PDF document text
    • http://kpovli.ru/14758847662j400e.pdfIn PDF document text
    • https://fofumizuzel.weebly.com/uploads/1/3/2/7/132740209/buxetebudanusajide.pdfIn PDF document text
    • https://mudulavodeg.weebly.com/uploads/1/3/1/0/131070753/8161533.pdfIn PDF document text
    • http://latencfsrt.space/26591673869mjxme.pdfIn PDF document text
    • http://nout-prodat.site/minimum_industry_safety_training_answerscm0th.pdfIn PDF document text
    • http://gprofights.ru/adding_and_subtracting_fractions_2_answersdakxl.pdfIn PDF document text
    • http://roxelejabojafe.scienceontheweb.net/garuvevewudemugasizovub.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/zamuriza/judaism_symbols_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/3259840375.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/rom_devil_wing_quest_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/binusasujidavexi.pdfIn PDF document text
    • https://s3.amazonaws.com/mokixetat/valewuj.pdfIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/3d_adventure_games_for_pc_free.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/xfinity_xr2_remote_not_controlling_volume.pdfIn PDF document text
    • http://wudazebej.atwebpages.com/jegamuvanitiraxoxavuko.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/tatogijetopulurusudukebuz.pdfIn PDF document text
    • http://nekelaxowe.atwebpages.com/au_aw_al_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/likadojivivofu/ridepamajena.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e602.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE602 5012 bytes
SHA-256: e0e3b52e325fecabab1e2d6fbb2b6c1c1e01d8ec5d4d7431e249f2cf6ba2e1cd
font_01_sfnt_off0000f6ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6EC 10736 bytes
SHA-256: 8a0e0d2fa9fda21541294d971a0e03d442f5a49e0922f66c1133b32fa3f45830
font_02_sfnt_off00011b5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B5B 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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