Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc316624ceb386da…

MALICIOUS

PDF

85.4 KB Created: 2021-04-03 13:54:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 47aed0fb861ff1832cf6a87c6f1f14e2 SHA-1: 0682b8ce973d47f11e3644d2fc5fabc4ab076c07 SHA-256: dc316624ceb386dadbcca581394a0ca7a578d841a766535c6fc0cabe6a6a80aa
184 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links, with at least one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document's structure and embedded links suggest it's designed to trick users into visiting compromised or malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/strik?utm_term=how+to+replace+my+keurig+water+filter In PDF document text
    • http://tramlaweq.online/3863510744876xjb.pdfIn PDF document text
    • http://hhizmet.com/the_daily_stoic_book_summarykwhw3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471275/normal_6050023471fed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418575/normal_5fefe77987a68.pdfIn PDF document text
    • http://megantv.site/venev4yama.pdfIn PDF document text
    • http://tixshopclub.space/connotation_worksheets_for_middle_school4ayhx.pdfIn PDF document text
    • http://bcpzonasegura10beta-viabcp.com/organic_chemistry_wade_8th_editionx1rqe.pdfIn PDF document text
    • https://cdn.sqhk.co/nozujeraguje/bjgjhhA/download_car_simulator_japan_mod_apk_oppana_games.pdfIn PDF document text
    • https://cdn.sqhk.co/sadudolamom/jg3Qfhj/33853890947.pdfIn PDF document text
    • http://frankiearvelo.com/jodexudegeselukgjb23.pdfIn PDF document text
    • http://kengoru.space/myasthenia_gravis_adalahpkfie.pdfIn PDF document text
    • http://delayikapy.xyz/60372767476w5a19.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409113/normal_606115a168d71.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485698/normal_6059a962f3878.pdfIn PDF document text
    • http://1xbets-reg.site/2811423026tcts4.pdfIn PDF document text
    • http://reduslimitalia-ufficiale.site/joss_whedon_wonder_woman_screenplayvlu5j.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://64f1e6a9-4530-4009-9f9b-67b91dd69f79.filesusr.com/ugd/76b6de_8b718737ea744cde9669e705d021013b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e96bd0f6-53f2-4b67-8796-be2daee4e6da/labezonumuwoxatikuzitife.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23cb1ce8-f381-4642-9688-cbfa3fdcf4af/lunavarigoxudume.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c4e5241-80a3-4a89-898e-daf25c63b973/80031767429.pdfIn PDF document text
    • https://ddb0fe67-a09a-413d-b59a-c21b1dde3186.filesusr.com/ugd/3f0e57_a0f2c07bc529456289408fada6baa3e1.pdf?index=trueIn 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_off00011104.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11104 5376 bytes
SHA-256: d680aadb7fa37fe30f0f0888f20a1519ef32d8a5de4fbb032291e8306882e9b5
font_01_sfnt_off0001235a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1235A 10716 bytes
SHA-256: 6e29c691e86dcf7015e4184973b6b360bf51de228dcabee8fda4fa5b7164f043

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