Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd868fec8da7877e…

MALICIOUS

PDF

64.9 KB Created: 2021-06-08 08:56:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: d23d0d9536b65165109499e43bf796ab SHA-1: ab61a473c8af2e34130de92f1f81253be70c92ca SHA-256: cd868fec8da7877efc7611ef3ea899d94031c9b8934ae99010d18e12dd8d369b
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded URLs, with one specifically identified as a potential phishing lure related to a driver's test. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicates a large number of links hosted on disposable domains, suggesting a tactic to obscure malicious destinations. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8428

Heuristics 4

  • 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
  • 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://cructi.ru/pbw?utm_term=what+to+know+for+florida+drivers+test PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4476281/normal_5fe7e030e5466.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392860/normal_5fc87ef1dcc68.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4493600/normal_60b4dc441e247.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409118/normal_60534a6b4aaf1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426090/normal_5fddfa903daf4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409621/normal_60547dc13e0f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462986/normal_6024ad6e311f9.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/60355d8c-ef13-4eef-8ccf-078580ca5470/rapafa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e920d6c3-ff63-45d8-bf0d-a1d9e1711942/vapafusisoxegef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b236614-c36d-4f43-9545-cdf2c0f7bd6b/what_oil_does_wendys_fry_in.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cacee42e-1e49-4577-b72a-5a92063eb4a1/how_do_i_add_an_image_to_a_photo_on_iphone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34e78b4e-54ed-4f6a-b485-2805c8431bf2/pofuxunosaxogeviwepo.pdfIn PDF document text
    • http://fuvesiwowegu.pbworks.com/f/memikitofuruwezun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d72c7b15-6380-420d-a2b9-ca3e5d304131/mibaxamo.pdfIn PDF document text
    • http://palixazoke.pbworks.com/f/why_will_my_pellet_stove_not_light.pdfIn PDF document text
    • http://tuvovazuvezo.pbworks.com/w/file/fetch/144652854/mobile_odin_pro_apk_free_download.pdfIn PDF document text
    • http://fawugomem.pbworks.com/f/best_story_saver_for_instagram.pdfIn PDF document text
    • http://sovafiben.pbworks.com/f/54403513946.pdfIn PDF document text
    • http://xoxafepapesu.pbworks.com/w/file/fetch/144794418/furozurisosiluriwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db85162b-0304-4d6e-8fd0-091aea21ae3d/44336292842.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD33 5224 bytes
SHA-256: 16805d3cf7799712d6b52dc54bbfcfad958c91cb5d125c354757b4cf1c52d92c

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