Malicious PDF — malware analysis report

Static analysis result for SHA-256 4aba10cc5a3331e3…

MALICIOUS

PDF

96.3 KB Created: 2021-02-17 18:41:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 89ae8b2978c497e337aa8a2eadf5066a SHA-1: 2815d20184d617a662136651bf2108d10b3ae9d8 SHA-256: 4aba10cc5a3331e39094427a4e8a6ac1e29761fe8b9b94f3d42efe263176ca47
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious domain, identified by ClamAV as 'Pdf.Phishing.Trojan'. The ML classifier also flagged it with high confidence. The document body is heavily obfuscated, suggesting an attempt to hide malicious content or a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/123?utm_term=what+do+the+95+theses+say PDF link annotation
    • https://cdn.sqhk.co/duvapegoleva/jbdB2yP/hobby_lobby_closing_in_ct.pdfIn PDF document text
    • https://cdn.sqhk.co/xudekutof/jipKngP/muximiwanoradowokizomamiv.pdfIn PDF document text
    • http://salufogi.iblogger.org/galvanized_steel_sheet_properties.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wisuw/94653849103.pdfIn PDF document text
    • https://s3.amazonaws.com/pegek/5949616861.pdfIn PDF document text
    • https://s3.amazonaws.com/ninazarila/akshara_sad_song_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/using_idioms_in_formal_writing.pdfIn PDF document text
    • https://s3.amazonaws.com/waduzirader/avon_catalogue_septembre_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/decimals_percents_and_fractions_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/kujesulad/online_video_call_software.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/urticaria_cronica_tratamiento.pdfIn PDF document text
    • http://rizaxofu.rf.gd/import_css_stylesheet_html.pdfIn PDF document text
    • http://kisuneronebel.rf.gd/26022565244.pdfIn PDF document text
    • http://kosidigipetuvu.epizy.com/14640598352.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/11013694126.pdfIn PDF document text
    • https://s3.amazonaws.com/gisujubolidine/brush_lettering_templates.pdfIn PDF document text
    • http://ruxududomaba.epizy.com/38989314956.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/report_counterfeit_item_on_ebay.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/iowa_mandatory_reporter_number.pdfIn PDF document text
    • https://s3.amazonaws.com/wujanozo/zitaj.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012fb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FB2 4812 bytes
SHA-256: 4c09b2aec37aada0d4d5c921ecbf505fd4ea12858a2bce60706da0ad56dfe9c1
font_01_sfnt_off0001402c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1402C 11280 bytes
SHA-256: b111d3ba4d996f43ff75f3bde4fc77c04f078006b5e3874c3b439dc7c31acf3e
font_02_sfnt_off000165a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x165A3 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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