Malicious PDF — malware analysis report

Static analysis result for SHA-256 a98b86456f1fb22f…

MALICIOUS

PDF

67.3 KB Created: 2021-02-19 11:08:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: a85d664fc02b1aee929d49dffb83e392 SHA-1: 0c81e616e3c205675302a9569ccc793449ef927c SHA-256: a98b86456f1fb22fb7ed842c9dd2fa61451bf7a398365cd482670597f2707a71
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified by heuristics and a machine learning classifier as malicious. The document body, though heavily obfuscated, suggests a lure related to a 'Motorola s10 manual'. The presence of multiple unknown URLs further supports a phishing or malware distribution attempt. No scripts were extracted, but the overall structure and heuristic firings strongly indicate a malicious intent to redirect the user to a compromised site.

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://maypoin.ru/123?utm_term=motorola+s10+manual PDF link annotation
    • http://compte-cmbretagne.best/lr_androids_dokkan_battlece6sp.pdfIn PDF document text
    • http://tdsevsvet.ru/probability_distribution_questions_and_answers4pj07.pdfIn PDF document text
    • http://fartook.online/excel_vba_tutorial_in_tamildcx1c.pdfIn PDF document text
    • http://123dutch.com/peacemaker_tulsa_reviewsjx9rr.pdfIn PDF document text
    • http://zatorigixoluji.iblogger.org/algo_trading_basics.pdfIn PDF document text
    • http://service-hire.com/biology_class_11_book448cd.pdfIn PDF document text
    • http://bufo.online/bubapuleguworibogw7rz.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/lowuwofuxali/56238386918.pdfIn PDF document text
    • http://pexefenebize.epizy.com/break_off_your_back_song.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/26428995833.pdfIn PDF document text
    • https://s3.amazonaws.com/naxozelozude/ap_english_literature_and_composition_textbook.pdfIn PDF document text
    • https://s3.amazonaws.com/patilawasu/sepereviwezuker.pdfIn PDF document text
    • https://s3.amazonaws.com/jopomodilamego/circus_elements_vector_free.pdfIn PDF document text
    • http://xujalev.rf.gd/bodies_that_matter_review.pdfIn PDF document text
    • http://zotomogizolelaz.rf.gd/auto_click_android_appvn.pdfIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/89383021515.pdfIn PDF document text
    • http://nofadokar.rf.gd/70985970234.pdfIn PDF document text
    • https://s3.amazonaws.com/jujojomojemiz/bloody_roar_3_pc_setup.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/65677075155.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_off0000c8df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8DF 5028 bytes
SHA-256: 1e1cf253350564e465f915077ba0853bcd880763af21aeedda603111ff489867
font_01_sfnt_off0000d9eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9EB 11716 bytes
SHA-256: 8f5e4fe49876057d92a0723b27a45cedaff649de15e8f6f855d627d3f98fcaa5

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