Malicious PDF — malware analysis report

Static analysis result for SHA-256 c90dba97ecf4cbc5…

MALICIOUS

PDF

79.3 KB Created: 2021-02-23 19:55:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: dc752ed518b326cd3dded1b1256c534f SHA-1: d6698593e1d401cab7abf7809ea1108c929bea74 SHA-256: c90dba97ecf4cbc59248c2e8a9310ed29bc712444a6ca80a4adb3f2fbe0ddc6d
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URL that directs to a suspicious domain, likely intended for phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to literary summaries, a common tactic for social engineering.

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
  • 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://seumenha.ru/strik?utm_term=the+masque+of+the+red+death+summary+enotes PDF link annotation
    • http://letekidela.iblogger.org/61646607061.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://setowibuvi.epizy.com/tureduzujuwazovivonikisum.pdfIn PDF document text
    • http://towawemigegi.epizy.com/levokewefibitivibawaligo.pdfIn PDF document text
    • https://s3.amazonaws.com/dipafuxe/acc_aha_guidelines_endomyocardial_biopsy.pdfIn PDF document text
    • http://mufejerawuvolej.epizy.com/18883517763.pdfIn PDF document text
    • http://gegawuwiru.epizy.com/minecraft_pc_offline_free.pdfIn PDF document text
    • http://felakaselik.epizy.com/78275029037.pdfIn PDF document text
    • https://s3.amazonaws.com/kasuwevovog/41067669784.pdfIn PDF document text
    • https://s3.amazonaws.com/varoximu/83462376466.pdfIn PDF document text
    • http://zuwasezubolek.rf.gd/ajio_app_for_pc.pdfIn PDF document text
    • http://remofexemuja.rf.gd/45260064916.pdfIn PDF document text
    • https://s3.amazonaws.com/dazutun/national_geographic_magazine_march_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/mosezavor/action_bible_download.pdfIn PDF document text
    • http://ginisanekuxowo.epizy.com/tell_me_about_yourself_in_interview_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/fipijife/country_guitar_backing_tracks_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wukara/broly_height_base_form.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/liberty_city_stories_apk_2._2.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_off0000f8bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8BB 5292 bytes
SHA-256: eb271a10f99048de7b7dfdc5a54c6fc66137fd07533342b6c24b2573c9b25729
font_01_sfnt_off00010a90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A90 11072 bytes
SHA-256: f8383f436ed9c291ccdcd44c7b6302ba94187de48384c0e2bb1a50cfd077d235

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