Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d315e5e8c905b74…

MALICIOUS

PDF

72.1 KB Created: 2021-03-24 12:35:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d3341cb102cb3a2c76e078caf5da4ee5 SHA-1: 9190cf77563faaad73c62061f0c83493b49866df SHA-256: 6d315e5e8c905b744e37cedb33ddf8544fda9acff7861ce7871f81fff5d4a97b
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 0.9997

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://gimoguvi.ru/123?utm_term=instagram+stories+template+sketch PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4369518/normal_5feb98dc15e6d.pdfIn PDF document text
    • http://xilibinebosapeg.mywebcommunity.org/zubumizosewofan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462093/normal_600c375caa48c.pdfIn PDF document text
    • http://xipulax.iblogger.org/63874313027.pdfIn PDF document text
    • http://dajexori.mypressonline.com/landscape_architecture_design_books.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478387/normal_60517ac07d6cc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409396/normal_5ffd25c63b96c.pdfIn PDF document text
    • http://xipodijajul.sportsontheweb.net/biogenesis_y_abiogenesis.pdfIn PDF document text
    • http://numupizor.22web.org/40261055459.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/8f6628b1-0211-4757-a5a0-408969092813/tuforepazapo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84bbba36-a913-47fa-aeb3-1dd8fc90bca9/how_to_fix_cuckoo_clock_time.pdfIn PDF document text
    • http://vitixageseda.rf.gd/airtel_wynk_music_app_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97d5041c-8b6f-4f31-8066-e11c0bfb6083/texas_county_sales_tax_rates_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50fa5834-58fb-4116-b138-b14f30773c6e/70928837250.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/683535ba-e730-4d60-90cc-441e9bb87cc2/john_deere_7000_planter_plates_for_sale.pdfIn PDF document text
    • http://zutugidod.onlinewebshop.net/how_do_i_become_a_certified_data_analyst.pdfIn PDF document text
    • http://kegigija.atwebpages.com/lurukidubi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/312703ee-afa0-4af2-b3c2-d88603dced1b/what_is_the_significance_of_the_number_600_in_the_bible.pdfIn PDF document text
    • http://peledopa.myartsonline.com/61754280222.pdfIn PDF document text
    • http://rofijig.rf.gd/endocarditis_treatment_guidelines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19647476-0957-409a-8acd-4ec6bb0cda7c/in_christ_alone_ukulele_chords_easy.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_off0000dcfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCFD 5348 bytes
SHA-256: d73aff96ef1fa8bbba201312f0c3d90f85cc9dac05f26cc1717f8384084fe551
font_01_sfnt_off0000ef05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF05 10596 bytes
SHA-256: 2f573f40f96e440c2382bd85d491c050013d885eb1113ab1d2944e7d1267b43b

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