Malicious PDF — malware analysis report

Static analysis result for SHA-256 76b14fc6275d5b70…

MALICIOUS

PDF

74.1 KB Created: 2021-02-05 11:48:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: b5e2e9c4a4aa80e22b4d0ed67ce25674 SHA-1: f4c384459df7fa983daedb0d7c2cbc33ad4d2239 SHA-256: 76b14fc6275d5b706819477b04d353e6f19b54372413805b8528c99bf2331e0a
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://jacksth.ru/wb?keyword=english%20to%20bengali%20offline%20dictionary%20free PDF link annotation
    • https://cdn.sqhk.co/reruzemafow/Pujehj7/monster_hunter_stories_ride_on_lute.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496818/normal_5ff84db61e2a6.pdfIn PDF document text
    • https://cdn.sqhk.co/redusebi/7igUbhe/round_dining_room_tables_and_chairs_for_8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453344/normal_6011796fd8738.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxovunevo/jevjcak/47220671803.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393925/normal_5ffb467e65a22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477147/normal_60146b281bb2b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490367/normal_60017e1832d9c.pdfIn PDF document text
    • https://cdn.sqhk.co/wazofelagi/ji1hije/10687126889.pdfIn PDF document text
    • https://cdn.sqhk.co/wazafanez/jigf7Iw/38134671015.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404983/normal_5fd7f63911b4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454808/normal_5fd9335bc742e.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/rupatojuko/65589990945.pdfIn PDF document text
    • https://s3.amazonaws.com/nijudow/harry_potter_movies_list_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/xanunafojuloki/bauer_bodoni_italic.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/39727935427.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/zarexepapuva.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/74124011380.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_off0000e2fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2FC 5480 bytes
SHA-256: 5341f244b622a46ddc12248105d69a6dc8369530d9c7494107065bbd6958d648
font_01_sfnt_off0000f5a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A6 11108 bytes
SHA-256: 691b0e3ddaa0fadbd67543fdbbf63a13383b09dfecbf8d9092058411b0e18695