Malicious PDF — malware analysis report

Static analysis result for SHA-256 b04e10082a79f5c7…

MALICIOUS

PDF

71.7 KB Created: 2021-01-22 06:29:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 4dad231e65df55e211077281440c6c3f SHA-1: 77d12ab799a542984397f73134fe5c61332f1bde SHA-256: b04e10082a79f5c709f93911a6cc3ba37a07b26c443b8e26c23336ad9dd321d9
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://traffmen.ru/123?utm_term=dish+and+spoon+nursery+rhyme'. ML classification and ClamAV also flagged the file as malicious. The presence of embedded URLs and the nature of the redirector suggest a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://traffmen.ru/123?utm_term=dish+and+spoon+nursery+rhyme In PDF document text
    • https://cdn.sqhk.co/mepapogivoma/eRYo6ha/dunia_games_ml_voucher.pdfIn PDF document text
    • https://cdn.sqhk.co/zenujulikik/jigfkgj/wastickerapps_cartoon_stickers.pdfIn PDF document text
    • https://cdn.sqhk.co/dogutadova/ifjcgj2/dabuvufalaso.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452169/normal_5ff0cfc64a5d8.pdfIn PDF document text
    • https://cdn.sqhk.co/rukeditele/giPfjbu/18522433220.pdfIn PDF document text
    • https://cdn.sqhk.co/zofizitene/GvggxgN/max_guides_for_clash_of_clans_account_free.pdfIn PDF document text
    • http://pugoposug.iblogger.org/livugi.pdfIn PDF document text
    • https://cdn.sqhk.co/mogizilo/fIb4aYz/2575011169.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rilenipavow.rf.gd/investment_appraisal_journal.pdfIn PDF document text
    • http://wukefomirufiza.rf.gd/add_icon_to_radio_button_android.pdfIn PDF document text
    • https://s3.amazonaws.com/sefabe/free_full_games_my_talking_angela.pdfIn PDF document text
    • http://gowojurepola.epizy.com/crossword_puzzle_food_related_vocabulary_spanish_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jexijer/film_fast_five_sub_indo.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_off0000dc9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC9A 5268 bytes
SHA-256: ae95ad0ee9a65c36b87577e5df48f57d71c84a7ac9ddbfaec7a31ce205d8fe3f
font_01_sfnt_off0000ee6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE6A 10512 bytes
SHA-256: 19b867ffa3c5f797350c0dc644ec0e0fcd2205ba795131c72dfee847e31ab880

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