Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec317d7d81b78f18…

MALICIOUS

PDF

75.4 KB Created: 2021-01-21 01:57:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 6357c1094199b757624d0d2f289f8eb9 SHA-1: 99abe071821dca32cf0b8671c2c4a88fae98d0ef SHA-256: ec317d7d81b78f18751e508269d1913cb6700492e7d677d0c5a06dcd763d0eea
154 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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=byu+bbl+schedule In PDF document text
    • https://cdn.sqhk.co/dopuwene/Kifojd0/granny_smith_apple_puree_near_me.pdfIn PDF document text
    • https://site-1166703.mozfiles.com/files/1166703/husqvarna_chainsaw_manual_240.pdfIn PDF document text
    • https://site-1217437.mozfiles.com/files/1217437/learn_javascript_for_web_development_udemy.pdfIn PDF document text
    • https://site-1178382.mozfiles.com/files/1178382/cable_and_deadpool_comic.pdfIn PDF document text
    • https://site-1175290.mozfiles.com/files/1175290/98577563121.pdfIn PDF document text
    • https://cdn.sqhk.co/samivegin/IiejheT/dave_kops_tournament_of_champions_2020_bracket.pdfIn PDF document text
    • https://site-1236051.mozfiles.com/files/1236051/71677416320.pdfIn PDF document text
    • https://site-1178965.mozfiles.com/files/1178965/66372437855.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/kudowo/block_game_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/41196227646.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/uk_malaria_treatment_guidelines_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/hardened_steel_file_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/medisesogirovagusunowitu.pdfIn PDF document text
    • https://s3.amazonaws.com/lososimap/lonajejumas.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_off0000ea23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA23 5012 bytes
SHA-256: e7b9dfcb07599dcbff0b4d95a5eb0c7dcd86b767d80ab57a9b541e70c4dce194
font_01_sfnt_off0000fb38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB38 11568 bytes
SHA-256: 33734411e7a0d980bfee51715862bd64b2cc66df4846f144218a39be4c6f8810

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