Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfda05536d9d8677…

MALICIOUS

PDF

173.6 KB Created: 2021-02-12 23:57:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: b6afc233f36fcd14ecae78a558581ce7 SHA-1: 1cca1e1aa38b5da9380a391b2dc9d60b235237cc SHA-256: bfda05536d9d86776a67aceabdd2af76a6ec15e8cee2e87fc590fdfa7a7d2311
104 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of an embedded URL and urgency lures suggest a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a common attack pattern for delivering malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://leonvi.ru/wb?keyword=aha%20stroke%20secondary%20prevention%20guidelines%202018 PDF link annotation
    • https://cdn.sqhk.co/miwizawi/llgdidV/rockauto_nissan_altima.pdfIn PDF document text
    • https://cdn.sqhk.co/sutadejuna/X5Vhc7A/highway_to_heaven_road.pdfIn PDF document text
    • https://cdn.sqhk.co/rivotoxupow/hgejihU/free_ringtone_app_for_iphone_11_pro_max.pdfIn PDF document text
    • https://cdn.sqhk.co/vumorumuvogi/gjdGgeQ/mubomipubari.pdfIn PDF document text
    • https://cdn.sqhk.co/jonimaze/oJQjaid/olympic_logo_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/masamiwe/gfxIvjc/football_referee_uniforms_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/zojoguxuban/kYo7qjg/exponential_two_points_calculator.pdfIn PDF document text
    • http://slimitalia.space/manualidades_con_palitos_de_madera_paso_a_pasooejjy.pdfIn PDF document text
    • https://cdn.sqhk.co/letijefa/gihbihi/godus_tips_astari.pdfIn PDF document text
    • https://cdn.sqhk.co/gisatajofo/jgdgrhi/world_war_2_countries_involved_map.pdfIn PDF document text
    • http://soul-felt.com/lonofcjj0p.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/remuv/injustice_gods_among_us_pc_setup._exe.pdfIn PDF document text
    • http://padepivezaw.rf.gd/jakixirupinolepumujepen.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/50752553420.pdfIn PDF document text
    • https://s3.amazonaws.com/xaliwalufoguni/dixivejekapedinop.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/xefejevudan.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_off000268d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x268D4 6072 bytes
SHA-256: 107f4d57f69fe4006f94aa1b6c4190135872b4c9f61501371e9cf54eafcb141c
font_01_sfnt_off00027d8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27D8D 14260 bytes
SHA-256: 20c09aed225e339a9eeb0a869851c5751b9fadbcae60e43864e5120538ae55d8

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