Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d2c47b09ff750bc…

MALICIOUS

PDF

89.5 KB Created: 2021-04-12 22:34:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 4ba1c4bb5f2a4c18f9b636909fec92db SHA-1: 3d6e7e245a7aae6a95fc562e495aa261001b86fd SHA-256: 1d2c47b09ff750bc5c1638b5c39312300718d12605a4d38b25e239e404a9d292
126 Risk Score

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 0.9991

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://midufefew.ru/strik?utm_term=stihl+fs90r+trimmer+parts+diagram PDF link annotation
    • http://xonigej.mypressonline.com/81708094145.pdfIn PDF document text
    • http://rebezun.mygamesonline.org/kitchenaid_stand_mixer_tilt_5_quart_rrk150wh_artisan_tilt_white.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451049/normal_605c381f92e87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530868/normal_601ee6edba7e5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459328/normal_5feb40e6295c0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422372/normal_5fde3b2184eeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457311/normal_5fe79cce91e69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462694/normal_601d95f573acc.pdfIn PDF document text
    • http://sumapewub.getenjoyment.net/advantages_and_disadvantages_of_social_networking_sites.pdfIn PDF document text
    • http://jorowijedo.mywebcommunity.org/40612532748.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452152/normal_5ffa2306f3093.pdfIn PDF document text
    • http://zesaguzijor.mypressonline.com/what_order_should_i_read_the_me_before_you_books.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/1aa0d5cc-51ee-4b91-9c5a-a6a492f98d80/37889305891.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d1447a5-1401-429b-944f-f5b56c452ba7/how_to_repair_proform_elliptical.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2bd06af-9d9e-4ff9-90ed-669dd11c9563/41849183974.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/285d3fa3-de6f-4520-867d-17304277ad36/51462446378.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1dfb541-fcf5-4d34-a7e5-567a4a878248/nyx_cant_stop_wont_stop_foundation_shades.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5966bdac-7cfb-4274-8e3b-a681c39e450a/coso_framework_stands_for.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37d3ec20-c59d-4aa3-9725-3fd352a68f6c/11153757427.pdfIn PDF document text
    • http://ladurabazidema.onlinewebshop.net/5415247043.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e25ce28c-db56-434f-84a7-cecbbfb698a2/lord_of_the_flies_summary_chapter_10-12.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f0c4ebf-de73-4c72-8f13-31f7b3feb861/sutuxep.pdfIn PDF document text
    • http://wuwedilejom.myartsonline.com/personal_branding.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_off000111b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111B3 5856 bytes
SHA-256: ae3664a8e5f3cc73953549d0db8a791f47a86c301d0106da5cf3aa1adde76346
font_01_sfnt_off0001256c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1256C 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off00012df9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DF9 11828 bytes
SHA-256: 3f851c81429e17d610067a9631aec77d0b8c0476e719e36836018e532f923c3d