Malicious PDF — malware analysis report

Static analysis result for SHA-256 816423a80da5659e…

MALICIOUS

PDF

71.8 KB Created: 2021-02-28 08:48:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: d1f01b7f3073f29854b060fd97093784 SHA-1: 2c570fe0b79c3ac034b634992d75196bcfd7a5b9 SHA-256: 816423a80da5659e68486218b694cf8b55aafdbe31afaf36e673e464bfc87327
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 URL pointing to a suspicious domain. Heuristics indicate it's a phishing attempt, and ML classifiers strongly agree. The document body, though heavily obfuscated, appears to be related to the URL's keyword, suggesting a social engineering lure.

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://jottigo.ru/award?keyword=overlord+volume+10+chapter+2+skythewood PDF link annotation
    • https://cdn.sqhk.co/zajujinul/agcjdgd/53133563659.pdfIn PDF document text
    • https://cdn.sqhk.co/vasozaponem/aKJXzhx/42296468378.pdfIn PDF document text
    • https://cdn.sqhk.co/pulafefer/qqsHoif/sani_cloth_af3_covid.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453889/normal_6005446da04b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414156/normal_5fdbd1f0a2b23.pdfIn PDF document text
    • http://wiloweredivon.iblogger.org/72165683909.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499653/normal_6035312b4b070.pdfIn PDF document text
    • http://safetymirrors.xyz/examples_of_newspaper_report_writingtkb4t.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvaratuji/yVgexgi/sijukomaridimopudunakagi.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/bokelur/30642467368.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/desemere.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/how_much_does_a_cdl_cost_in_oklahoma.pdfIn PDF document text
    • https://s3.amazonaws.com/potofaw/xalitifupekepagune.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/ipad_pathfinder_character_sheet_app.pdfIn PDF document text
    • https://s3.amazonaws.com/nutanigonu/which_washing_machines_have_lint_filters.pdfIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/furesisikobigonofakipeza.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/71540411228.pdfIn PDF document text
    • http://kodadus.epizy.com/bahubali_2_telugu_video_songs_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/bejokazemur/10517191193.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_off0000d984.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD984 5984 bytes
SHA-256: 9b3a9585670953e1aea1bdb20fbb4d1678f065a05ce21e6718c8c99736c418fe
font_01_sfnt_off0000edce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDCE 10560 bytes
SHA-256: 2b397abc3bb59570b44fc83d0780f48e4d454d5e2b6b873f2fcd4c144fd09ad5

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