Malicious PDF — malware analysis report

Static analysis result for SHA-256 9463cc2f73f48202…

MALICIOUS

PDF

97.2 KB Created: 2021-04-16 01:23:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: a264cc88068e7108b3023a60ab09a50d SHA-1: 04382d96e5113f71ab27ab3f483cdea8084db159 SHA-256: 9463cc2f73f482027eb698d71c78b2f3eb6641ce814e7e1032cfa15eca5d8edf
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://yafferge.ru/strik?utm_term=how+to+access+level+2+on+thinkorswim+app'. This URL is likely part of a phishing campaign designed to trick users into visiting a malicious site. The ML classifier and ClamAV also flagged this PDF as malicious, supporting the phishing lure attack pattern.

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
  • 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.
  • 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://yafferge.ru/strik?utm_term=how+to+access+level+2+on+thinkorswim+app In PDF document text
    • https://cdn-cms.f-static.net/uploads/4457590/normal_601b378bd53dd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373301/normal_5ff3133b14236.pdfIn PDF document text
    • http://teksol.xyz/whirlpool_dishwasher_top_rack_parts385o1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415748/normal_6031b878057f5.pdfIn PDF document text
    • http://help-copyrightviolationhelpcenter.com/graphing_exponential_functions_practice_answer_keye7jjq.pdfIn PDF document text
    • https://cdn.sqhk.co/pefisemise/giV6gg3/fish_aquarium_filter_price_in_pakistan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502236/normal_603eb0fecd153.pdfIn PDF document text
    • https://cdn.sqhk.co/supesuvepo/ahepJgg/nintendo_switch_sandisk_or_samsung.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371498/normal_5ff493435af8e.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/tojazudibumogab/elementary_statistics_a_step_by_step_approach_a_brief_version_7th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/mokixetat/ropuza.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/8163886002.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/88760470723.pdfIn PDF document text
    • https://s3.amazonaws.com/kozibowisenatu/slaves_to_darkness_battletome_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxalirudidel/delaware_river_club_fishing_report.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_off00013e6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E6D 5484 bytes
SHA-256: 6834cbfc8112db8947f7705c696a28e2cea172e83657f531adf32131b6239f64
font_01_sfnt_off000150fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150FC 10936 bytes
SHA-256: ddb826c8f102ad5a552f4c70599975dfe13134a0dda5dd7a2c9ef3e57b1fb2ec

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