Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ec97e1ee7cff04f…

MALICIOUS

PDF

75.8 KB Created: 2021-03-11 21:53:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 742633a1056ed04d033f094a771195c0 SHA-1: 44b17e08c1c7e91cf39ffe70b079dbe49f8688ce SHA-256: 5ec97e1ee7cff04f81244bbc7d767b7974c7e603fd21a9382b922716d0f61cfc
96 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by ML classifiers and ClamAV. It contains an embedded URI pointing to a suspicious domain, likely intended for phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to educational materials, specifically an 'equation of a line worksheet'. No scripts were extracted, but the presence of external URIs and the overall detection profile strongly indicate a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://fokemale.ru/wix?keyword=equation+of+a+line+worksheet+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4381291/normal_603d2a6d7a136.pdfIn PDF document text
    • https://cdn.sqhk.co/rotuzuwibi/gqjjBIJ/41924426890.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvivemu/ejaibig/dugitujuz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365594/normal_5fe967ac44052.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444885/normal_5fe29f164e193.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500429/normal_5fded2b720d39.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485450/normal_5ffc788740c5b.pdfIn PDF document text
    • https://cdn.sqhk.co/ralapogifur/hhuaie7/juxed.pdfIn PDF document text
    • http://nupesupo.mypressonline.com/denon_avr_391_subwoofer_setup.pdfIn PDF document text
    • http://jakusavu.sportsontheweb.net/appassionata_secret_garden.pdfIn PDF document text
    • https://cdn.sqhk.co/gugosobor/5qgi6je/nobemu.pdfIn PDF document text
    • http://tomolijoponix.mypressonline.com/tartine_bread_recipe.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/tetofamuxulil/arctic_monkeys_wallpaper_android.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/how_to_write_visual_basic_program_in_excel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34fa5d72-adc2-4261-ba88-0154667f761a/73337152158.pdfIn PDF document text
    • https://s3.amazonaws.com/gurupixabogivaz/fuwonugajowujosagi.pdfIn PDF document text
    • https://s3.amazonaws.com/fevobelijogal/zaduperis.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/ireland_v_wales_rugby_match_report.pdfIn PDF document text
    • https://s3.amazonaws.com/tutasujal/20950146065.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bebf80d2-c357-45e9-8bea-30f6f9960f6c/vujitazuzexe.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/sorting_3d_shapes_worksheet_year_3.pdfIn PDF document text
    • https://s3.amazonaws.com/bomupi/xereb.pdfIn PDF document text
    • http://kuzemepusiloj.onlinewebshop.net/27682079210.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_off0000ec44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC44 5368 bytes
SHA-256: 37627aa875d14ae346647ab3ef0355f460a68a316ef6828198d8a15f393e2dd9
font_01_sfnt_off0000fe99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE99 10144 bytes
SHA-256: 16d82cf1a6f2824c699bf5ca651611bd156c36cfe31d5173f064e2a59f42cd19

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