Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a7b70aa5af80e76…

MALICIOUS

PDF

80.2 KB Created: 2021-06-06 11:33:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: dafce7a4bd266586f8b2d00ca6555d01 SHA-1: d98af0e1392705e520bb1bda44b8b25715ceb868 SHA-256: 5a7b70aa5af80e7669786e2b6e8fc832e40431e4493425fbefba4c9f1c3ed7d5
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 0.9993

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://laborke.ru/pbw?utm_term=how+to+get+culture+victory+civ+6 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454965/normal_5fd699a0c4ece.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4368978/normal_60b3dddd7be2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408177/normal_5fd9c7b4d0f32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480182/normal_600a81ac5fb00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447107/normal_6011e58a5ad65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473064/normal_6066108606ed8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379240/normal_6012e921d70e8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454809/normal_5fca5abce524b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gijutexamuwa.pbworks.com/w/file/fetch/144674658/42322782006.pdfIn PDF document text
    • http://xugilip.pbworks.com/w/file/fetch/144506559/quantitative_and_analytical_reasoning_mcqs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b83a1d22-b558-4536-a6af-485be1be02c8/how_long_is_azure_certification_valid.pdfIn PDF document text
    • http://fisukafetif.pbworks.com/w/file/fetch/144424971/the_lean_fast_diet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ce8a191-0065-4654-89b4-2e45b2c1a56b/yalla_shoot_tv_sport_live_streaming_bola_online.pdfIn PDF document text
    • http://jujupaw.pbworks.com/f/majimitidomurazeguxab.pdfIn PDF document text
    • http://gepefupugalu.pbworks.com/w/file/fetch/144486963/84314739174.pdfIn PDF document text
    • http://kipizasuzeda.pbworks.com/f/fazinewikigebujejur.pdfIn PDF document text
    • http://natutaliva.pbworks.com/f/kedi_the_chosen_one_download.pdfIn PDF document text
    • http://betosaxugawi.pbworks.com/w/file/fetch/144647607/85257073117.pdfIn PDF document text
    • http://molitutolu.pbworks.com/f/vovabosi.pdfIn PDF document text
    • http://wixugigir.pbworks.com/f/37067472768.pdfIn PDF document text
    • http://jobojifitin.pbworks.com/f/lovelirerikuto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d765099b-b357-4e07-be4a-c88079192c85/the_official_sat_subject_test_in_biology_study_guide_college_board_official_sat_study_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1ff075c-0d2f-46c5-8e1e-7d0adbfadc0e/yamaha_40_hp_tiller_outboard_for_sale.pdfIn PDF document text
    • http://ziludezubeju.pbworks.com/w/file/fetch/144463809/19369835314.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_off0000fca4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA4 4948 bytes
SHA-256: 984a90753189a5aa32f03aa3f386c2734c988567c0e45a3a67bd09bfd9319b78
font_01_sfnt_off00010db2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DB2 11036 bytes
SHA-256: 7819b844b8580e8901c1407a480792e945c489a831cbd2246824e3d8ac3edf32

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