Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec3abf603614466f…

MALICIOUS

PDF

74.4 KB Created: 2021-02-04 16:15:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 8fd1cf5f985988348d9fdec8240cf865 SHA-1: fc6b233e0d6f8e37272ecb2e34a8e801d920b3f6 SHA-256: ec3abf603614466fc6e3c9c5466d0df875cd753340a67a2e927318835802b9f4
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://bologen.ru/123?utm_term=how+to+make+a+bed+sheet+into+a+toga', which is likely used for phishing or to download a secondary payload. The document body, though partially corrupted, suggests a lure related to crafting a toga, which is incongruous with the technical nature of the file, further supporting a deceptive purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/123?utm_term=how+to+make+a+bed+sheet+into+a+toga PDF link annotation
    • https://cdn.sqhk.co/sejaganetaxa/jjgi0PN/dragon_blaze_gamevil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500665/normal_5fd62cc9a3c40.pdfIn PDF document text
    • https://cdn.sqhk.co/zofagopipowi/hjqjaYP/baluveposilutugumitola.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426422/normal_6005e96d5d23a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418362/normal_5fea07ac74fd2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390057/normal_5fd88257c8f9b.pdfIn PDF document text
    • http://fofikotopavabe.iblogger.org/mariadb_10._3_vs_mysql_8_performance.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lowazuxakosilal.epizy.com/angry_birds_2_without_google_play.pdfIn PDF document text
    • http://gefetela.epizy.com/veloxib.pdfIn PDF document text
    • https://s3.amazonaws.com/runuzitexokol/webupodigododa.pdfIn PDF document text
    • http://mobotovo.epizy.com/61156454798.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/r_alphabet_wallpaper_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/kodipopujufipig/dimensiones_del_aprendizaje_autonomo.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/kelpies_is_commutative_property_multiplication_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/70832991872.pdfIn PDF document text
    • https://s3.amazonaws.com/kozibowisenatu/47992175699.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/reported_speech_conversation_examples_with_answers.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_off0000e5ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5EA 5368 bytes
SHA-256: 0d6aa655204117b170753a225579a93f63e885b88ee0838233b3e96e23ee6264
font_01_sfnt_off0000f814.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF814 10756 bytes
SHA-256: 754a6ac7123ab3487544afb8f964066e306d85e3e94f8454d9ff3547ca2a9ee0

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