Malicious PDF — malware analysis report

Static analysis result for SHA-256 120df5daff9bedc7…

MALICIOUS

PDF

79.7 KB Created: 2021-03-18 06:52:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ba30dea2fc49ea556af86e868fe1b491 SHA-1: 2eff482dc1f659aa4fd7d290cbbda11f7b592fe0 SHA-256: 120df5daff9bedc71b95ee7fd01a2ca8c4d82e5afb22446fc3f9b79f193463d0
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9997

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://dugedepap.ru/wix?keyword=samsung+galaxy+themes+apk+mod PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4485309/normal_605140a9a08f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449014/normal_604a9e0283658.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459321/normal_6037df2f939d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498330/normal_601cbb163c37d.pdfIn PDF document text
    • https://ruwatija.weebly.com/uploads/1/3/4/8/134846771/5172d32aa05a.pdfIn PDF document text
    • http://tadigewatogonun.22web.org/bose_wave_music_system_iii_troubleshooting.pdfIn PDF document text
    • https://bafipiwefewojex.weebly.com/uploads/1/3/4/5/134576197/7080310.pdfIn PDF document text
    • https://lutibaviw.weebly.com/uploads/1/3/4/6/134669369/dogipe.pdfIn PDF document text
    • https://wixinuwexe.weebly.com/uploads/1/3/0/7/130739185/mimegedorafo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405208/normal_603930743c8c4.pdfIn PDF document text
    • https://zaxezoxixuj.weebly.com/uploads/1/3/6/0/136097133/7aa719.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://voderekop.rf.gd/consumer_reports_best_rated_suv_tires.pdfIn PDF document text
    • https://s3.amazonaws.com/tirimofufemukat/lanokajowowomebukenewava.pdfIn PDF document text
    • https://34e51215-b586-4e01-b3ea-a219475a7b91.filesusr.com/ugd/46481b_5c1a4a7f7e8c4ad7be544456ba20f904.pdf?index=trueIn PDF document text
    • https://53ebb62d-ddaf-432f-8dc3-1f4746653467.filesusr.com/ugd/bbd3cf_96041ec8a78047f996d57314296f7b6a.pdf?index=trueIn PDF document text
    • https://7835c217-6b95-46a1-915a-76cdebae3fe0.filesusr.com/ugd/debfb4_ccbe077b71ff449f855e8fa2f6290214.pdf?index=trueIn PDF document text
    • https://5de9ed01-d610-4143-94db-6f998645a8ce.filesusr.com/ugd/1d8bf6_34b8206778b64fd88c9f7456c6b40177.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/kaxanusalexukivowerumon.pdfIn PDF document text
    • https://e691ad07-92dc-45fa-af10-8929b4045ede.filesusr.com/ugd/87b9a8_e5e7ac0560a94a8cbe5b8129126e97d5.pdf?index=trueIn PDF document text
    • http://gajubadizoduj.epizy.com/flyer_photoshop_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/kugetutakar.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_off0000f900.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF900 5612 bytes
SHA-256: 2f22bed47377240403f4f99bdd46000b6e186e2131b3afd6977f62cf676b8239
font_01_sfnt_off00010bf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BF8 11012 bytes
SHA-256: e51946ef8085e30dbe3766ed74ab0e417778654f679fd2ad02cfe3ebbaac1012

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