Malicious PDF — malware analysis report

Static analysis result for SHA-256 6be5e3440c63d8f9…

MALICIOUS

PDF

77.7 KB Created: 2021-03-19 09:06:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d6ef3ffc4eee614b11289891e5164787 SHA-1: 158c91fe682f866665f8fafa623a0d669f8811e6 SHA-256: 6be5e3440c63d8f918e1cf473fecc1b973ebacf5980a834b8728321d3bc33346
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://resalured.ru/strik?utm_term=how+to+get+rid+of+pimple+marks+at+home+fast PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4390366/normal_5fe884ac7e359.pdfIn PDF document text
    • http://idealicaufficiale.website/boatswain_s_mate_manualvsazj.pdfIn PDF document text
    • http://agencymedia-ig.com/hopper_app_reviews_2018w5w2m.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418185/normal_5fddfff6329e4.pdfIn PDF document text
    • http://barcaporirternet-interbank-pe.com/how_long_to_cook_a_stuffed_20_lb_turkey_in_a_roasternlayo.pdfIn PDF document text
    • http://lajafago.medianewsonline.com/adobe_indesign_cs5_tutorial_free_download.pdfIn PDF document text
    • http://feremujidonigu.getenjoyment.net/calendar_ortodox_iunie_2020.pdfIn PDF document text
    • http://my-favshope.online/zavaxudomovapapaweteb691c.pdfIn PDF document text
    • http://torchland.xyz/wirugipbh48h.pdfIn PDF document text
    • http://immorta-cross1.club/bavezelikolepexorowaca57u.pdfIn PDF document text
    • http://povulofi.mywebcommunity.org/fukimobajoru.pdfIn PDF document text
    • http://snapchat-alert.com/sozadalusowidopirqyot4.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/dd38df4c-856f-4cb1-abdd-bfd5461d5cba/bagumiforinen.pdfIn PDF document text
    • https://bd15da75-ee01-4ad3-8b22-4778d9929f37.filesusr.com/ugd/1abc29_dc02e38072c04533849d6d336aa7c426.pdf?index=trueIn PDF document text
    • https://02ee9779-94d6-4ec7-959f-c0f99fe19a35.filesusr.com/ugd/cdc607_f13f81490bdb4d91b0d3beb0975ef1d0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fd06efc-91fd-4045-8a0d-14c36840987b/17711470930.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/679e6cd0-e08b-4428-9cba-9c421cc62265/what_size_wiper_blades_2013_mazda_3.pdfIn PDF document text
    • https://71bfc0c6-4bef-405a-aee6-9e9dcaab3d12.filesusr.com/ugd/708cfd_e11ecd5e08ee4e6fb9610f64f5001071.pdf?index=trueIn PDF document text
    • https://61069a5e-3c5f-4884-a3c7-8c7552058b74.filesusr.com/ugd/0789d5_17d2f6d9c46d4e938c729bac0d7b2ffa.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9eef38c6-0d5f-454e-8825-0efc8b99eea7/13315550484.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_off0000ec64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC64 5572 bytes
SHA-256: 901319865c573469ddb628bbd4f0956993aa3905cc97df17329397f4755761d9
font_01_sfnt_off0000ff41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF41 12116 bytes
SHA-256: 99e1ca29da20f9c6cc864a1bdbd5dd0b36ffb2d1fda2eb5822133dbee15764a3

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