Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ab2cd306b9fd9a2…

MALICIOUS

PDF

79.3 KB Created: 2021-04-06 20:40:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c4e5c1abb11ded664b3d67091b658b0b SHA-1: 36561f3e1159a62f39508028169922e1de2726de SHA-256: 6ab2cd306b9fd9a286726123b6ed4bed96eeafaa877f6466be3ae490e4a58afd
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/strik?utm_term=monster+girl+doctor+episode+6+english PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4476567/normal_6023f3de51fbc.pdfIn PDF document text
    • http://lukunezevowazol.sportsontheweb.net/bani_umayyah_dan_abbasiyah.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414678/normal_5ff0a269739cb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458124/normal_5fe3efc331980.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493227/normal_5fe2a502bb823.pdfIn PDF document text
    • http://vuzetasavuxoso.mygamesonline.org/35616990159.pdfIn PDF document text
    • http://zuduwamani.mypressonline.com/2017_toyota_camry_custom_seat_covers.pdfIn PDF document text
    • http://vurovolapoza.mygamesonline.org/bevexegalazovexid.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdfb6f36-dde2-4af5-b3b7-55ff39976061.filesusr.com/ugd/c6ac46_5b232174606849a3bb3280497a8eddf1.pdf?index=trueIn PDF document text
    • http://kijonag.onlinewebshop.net/common_core_kindergarten_math_worksheets.pdfIn PDF document text
    • http://tirisesu.onlinewebshop.net/lezapizaretidinorolepefe.pdfIn PDF document text
    • https://5c9c3928-af7d-4195-9e43-9647d7263c15.filesusr.com/ugd/508998_037ef2bc075d431fba9380539d24341b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tanapilamaxi/cron_schedule_format_every_minute.pdfIn PDF document text
    • https://979cd01f-16ea-4d2c-b189-234964c95597.filesusr.com/ugd/d4c4cf_7a361f0fdf1245fbbd888ce6f15b1e82.pdf?index=trueIn PDF document text
    • https://cbb9655c-b60d-4095-8c1c-bb5f9a2903c5.filesusr.com/ugd/4dd980_16ecbb7bd5b543edb9a7907016c378a5.pdf?index=trueIn PDF document text
    • http://wukevivetarapu.myartsonline.com/calculus_textbook_finney.pdfIn PDF document text
    • https://s3.amazonaws.com/zozofufulolig/55052234988.pdfIn PDF document text
    • https://b23183eb-b2e5-455e-bc25-91fac1efd10f.filesusr.com/ugd/cc14e4_210ab581e76d4563a3644135ce75c6cb.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f991.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF991 5284 bytes
SHA-256: d595aec10baee471617c17ff9d6bf0d3e5036f400421c4e25e9d00391d36b9fb
font_01_sfnt_off00010b90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B90 11016 bytes
SHA-256: 8e361bf9edd19db058c3a0a03ff568f8f620863dd9ed406994d0a8489508e722

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