Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d028dff0d4ed99b…

MALICIOUS

PDF

75.5 KB Created: 2021-03-02 10:05:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 3dfc3ff1daeee9cc0865f4f831d44efd SHA-1: ac63047ed4245e502574593d42327300d487c019 SHA-256: 4d028dff0d4ed99b55d82d32707c5ac06c880bfb836267b96d16ee0fbfa29f52
96 Risk Score

Malware Insights

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

The file is a PDF document flagged as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to a suspicious URL, which is likely part of a phishing or scam campaign. No scripts were extracted, but the presence of the malicious URL and the high confidence score suggest a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://crophysi.ru/award?keyword=alex+rider+season+2+episode+1 PDF link annotation
    • https://cdn.sqhk.co/jimevexir/Ko2gjgi/levubijupes.pdfIn PDF document text
    • http://nekidifuton.medianewsonline.com/replacement_remote_for_magnavox_dvd_player.pdfIn PDF document text
    • https://cdn.sqhk.co/dibirolinu/btFMFUH/71238307677.pdfIn PDF document text
    • https://cdn.sqhk.co/kewesowovim/ibfoIUR/53492447009.pdfIn PDF document text
    • https://cdn.sqhk.co/laxegipo/Fii9hhK/easy_smartphone_for_senior_citizens.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvukidovime/cJUjjge/big_3d_emoji_themes.pdfIn PDF document text
    • http://fukerijinexin.mygamesonline.org/87803547219.pdfIn PDF document text
    • https://cdn.sqhk.co/podoxato/tidwhjM/xuvija.pdfIn PDF document text
    • https://cdn.sqhk.co/menaleratupo/DiiLJie/nasokoginakuzetivobe.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/jifedefujodu/bulletproof_la_roux.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/prophetic_declaration_for_the_month_of_october_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/najipavez/64891875126.pdfIn PDF document text
    • https://s3.amazonaws.com/jubiferekaka/97733704925.pdfIn PDF document text
    • http://zuputes.atwebpages.com/dogako.pdfIn PDF document text
    • https://s3.amazonaws.com/nedijowewoded/ranabiliwezebebal.pdfIn PDF document text
    • http://tososite.onlinewebshop.net/welinaredaxivajedatomiti.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/best_android_tv_box_apps_canada.pdfIn PDF document text
    • http://pesetunal.onlinewebshop.net/sewixefigobewut.pdfIn PDF document text
    • http://bepalekene.rf.gd/2008_polaris_sportsman_500_ho_wiring_diagram.pdfIn PDF document text
    • https://s3.amazonaws.com/dazutun/53173476623.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_off0000ea81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA81 5192 bytes
SHA-256: 8408e4c78c8dee917d7738bddbf309af46cac2e6d4638d128f8a2cb89e68582f
font_01_sfnt_off0000fc42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC42 10720 bytes
SHA-256: 2e77d41c7463c7a5ea29993d065c8a48779d7731dcb346991f052a80674e0cd2

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