Malicious PDF — malware analysis report

Static analysis result for SHA-256 31f4e0f403586c12…

MALICIOUS

PDF

73.0 KB Created: 2021-02-09 18:08:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 28e42306440de998e1e5f87369116c3f SHA-1: 15307817347bb4af89b0d6706aeda3146f8cc221 SHA-256: 31f4e0f403586c12e220bf4185cf8601a94e933b93fd5e05a047652e6454b7ae
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is likely intended to trick the user into visiting a malicious website. The ML classifier and ClamAV detection strongly indicate malicious intent. No scripts were extracted, but the PDF structure and embedded URI suggest a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://druttle.ru/wb?keyword=algebra%201%20relations%20and%20functions%20worksheet%20answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4473052/normal_601fad6933972.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391611/normal_6011456f19e24.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383928/normal_600cf32369473.pdfIn PDF document text
    • http://vosalax.22web.org/duxinozojo.pdfIn PDF document text
    • https://cdn.sqhk.co/pesenexur/jeiHyMD/27887464491.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444378/normal_5fdce97c93f39.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370547/normal_600ac62fbdf79.pdfIn PDF document text
    • https://cdn.sqhk.co/tororukiwuri/zje0jc8/51592941969.pdfIn PDF document text
    • https://cdn.sqhk.co/xetosusaxi/96ibWid/90_s_hit_songs_list_in_tamil.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dojonuta/70819995599.pdfIn PDF document text
    • https://s3.amazonaws.com/werowibovezoje/14504940749.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/ice_cream_sundae_coloring_sheet.pdfIn PDF document text
    • http://soneloratugop.epizy.com/non_chronological_report_ks1.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/xoxoxejow.pdfIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/pdf_algorithme_2.pdfIn PDF document text
    • http://jufofokisib.epizy.com/caecilia_lt_std_font_family_free.pdfIn PDF document text
    • http://pizoxuwa.epizy.com/bach_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/tojazudibumogab/castlestorm_ps_vita_trophy_guide.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_off0000dd34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD34 5620 bytes
SHA-256: de056a36b87ac266868b594b924b7805ceb447dfb1c5e54427d6b3a4c894afb8
font_01_sfnt_off0000f067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF067 11464 bytes
SHA-256: cedfa491d188fdcacee75dbd715d85b6de1e89b0df6a59dadae9529039cfbbe4

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