Malicious PDF — malware analysis report

Static analysis result for SHA-256 586394f3d73763a0…

MALICIOUS

PDF

76.8 KB Created: 2021-03-12 14:24:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 10947e1f3063e143647bcdf7738a156b SHA-1: ff0239af65a8cbf82f5b320a073e01b41326e541 SHA-256: 586394f3d73763a0aa1e2d82ff3f7b753f6ffe10fe8c1dde138c87baefb2dd39
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of a 'download button' heuristic and an external URI pointing to a suspicious domain suggests the document is designed to trick users into downloading a secondary payload. The document body, though heavily obfuscated, contains metadata related to PDF creation, reinforcing its nature as a container for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://resalured.ru/award?keyword=literal+translation+examples+english+arabic+pdf PDF link annotation
    • http://discout.online/49435851796kd1om.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425483/normal_60070bf977586.pdfIn PDF document text
    • http://usmileofficial.site/vsco_apk_full_packjnjzy.pdfIn PDF document text
    • https://cdn.sqhk.co/kezomerameki/vgdy4hd/48301249915.pdfIn PDF document text
    • http://grizhoff.ru/halcyon_agri_corporation_limited_annual_report_2018foyw6.pdfIn PDF document text
    • http://erogan-encolumbia.site/libertango_violin_guitar_sheet_music1t3dl.pdfIn PDF document text
    • http://sanatoriy-izumrudny.ru/zikalunudamopobitewiweufqzs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456391/normal_600f8a4704895.pdfIn PDF document text
    • https://cdn.sqhk.co/dijogiper/hJjdjbC/pirate_art_projects_for_preschoolers.pdfIn PDF document text
    • https://cdn.sqhk.co/rufebumu/WhcifyD/video_call_recorder_app.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471971/normal_5fed65fe651bd.pdfIn PDF document text
    • http://creditscoretracking.info/amc_8_2017_resultsvitya.pdfIn PDF document text
    • http://itanah.space/how_to_fix_hunter_ceiling_fan_remotemv02w.pdfIn PDF document text
    • https://cdn.sqhk.co/dulemokel/fzgiekf/dafadodak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403672/normal_602288a59c0ac.pdfIn PDF document text
    • https://cdn.sqhk.co/sakiforivona/qC6hdja/buzzards_bay_brewery_food_truck.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490125/normal_6043360765915.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/kugelilizibuwum/renasajofozukabawaz.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/plural_form_of_compound_nouns_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/wapabefizosumi/yealink_t23g_quick_start_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/sesijesule/tivujuwit.pdfIn PDF document text
    • https://s3.amazonaws.com/ribowexulo/asphalt_nitro_7_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/kiguteperilodu/dentist_logo_template.pdfIn PDF document text
    • https://s3.amazonaws.com/kotodur/46437247045.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_off0000ee76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE76 5716 bytes
SHA-256: 3773c0fbe4fc0403defba89303d98abd1fd00bfe9baddcdcac30afd5b263c07f
font_01_sfnt_off000101ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101BA 10492 bytes
SHA-256: cf14b87984daffe03278e5aea11ccff673a025dca8ded15590a582bb401f01a6

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