Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd109b4d20d77f38…

MALICIOUS

PDF

77.7 KB Created: 2021-02-28 16:03:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 174c01d1e4a51373f058e3896582d0ac SHA-1: a04f5b1fdd75ff3020d6de26a99c0ca4994871a0 SHA-256: cd109b4d20d77f3849b24800d44b5e5fbf162532933f560b0d57e336b6417969
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI are indicative of a phishing lure, likely intended to trick users into visiting the malicious URL.

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://vilenefex.ru/123?utm_term=what+does+free+parking+mean+in+monopoly PDF link annotation
    • https://cdn.sqhk.co/resozasevej/eOyWdid/64003725578.pdfIn PDF document text
    • http://govugododuwo.iblogger.org/epson_throw_distance_calculator.pdfIn PDF document text
    • https://cdn.sqhk.co/ratosakip/hjgjKtC/sirolimus_cost_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/lopumilekana/jj2Gzgj/36397661910.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/wuzalugiseto/linux_android_studio_sdk_location.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/autocad_mobile_cracked_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/palikuvexake/74320420398.pdfIn PDF document text
    • https://s3.amazonaws.com/fenatagazise/60904391426.pdfIn PDF document text
    • https://s3.amazonaws.com/telasebisu/california_dmv_online_forms.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/eine_kleine_nachtmusik_cello_sheet_music.pdfIn PDF document text
    • http://zenutetuzobo.epizy.com/vulumonenisopupimi.pdfIn PDF document text
    • https://s3.amazonaws.com/popilo/android_games_apk_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/descendants_2_movie_mp4.pdfIn PDF document text
    • http://romezegipoxo.epizy.com/passport_renewal_application_form_ds-_82.pdfIn PDF document text
    • https://s3.amazonaws.com/wobuzisibal/5e_critical_hit_deck.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/99670369523.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/wagner_on_demand_905_power_steamer_manual.pdfIn PDF document text
    • http://lenadupubop.rf.gd/adjective_prepositional_phrases_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/wanalovum/android_studio_kotlin_tutorial_deutsch.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_off0000f1d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D7 5636 bytes
SHA-256: fd03e028fa882c86f4d92024704d83c2bae6eda0b8dd85b97079bccca37a538a
font_01_sfnt_off000104ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104EF 10612 bytes
SHA-256: 31ddf0571a6e439911ddc89a6e6e2818dbdf8b8be03aaf5cf4fe3a2bc45260b0

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