Malicious PDF — malware analysis report

Static analysis result for SHA-256 235fce721f67dc57…

MALICIOUS

PDF

74.3 KB Created: 2021-01-19 15:09:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 3ac60ee329bdbff20e927a955c0db5c0 SHA-1: 915a521fd80b6a1959258edfa4cd21eec7ea19ec SHA-256: 235fce721f67dc57d8fce5d8e305402a244c4db3f282d4b61e9c2f0f0ef297e4
144 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://maypoin.ru/wb?keyword=how%20to%20play%20spades%20plus%20game PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4412891/normal_5fe0352275711.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465392/normal_5fab30449d2b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443357/normal_5f9da98a5b93e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365656/normal_5f8a1fd561e2d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450733/normal_5fe477b311a5c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469116/normal_5ff776310d453.pdfIn PDF document text
    • https://site-1168173.mozfiles.com/files/1168173/leon_s_kennedy_resident_evil_4_wallpaper.pdfIn PDF document text
    • https://site-1173463.mozfiles.com/files/1173463/zugilixaruxomegudanivele.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478408/normal_5fc754a7770ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474448/normal_5fd18f5d894fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424011/normal_5fbd968d2d5e3.pdfIn PDF document text
    • https://site-1176636.mozfiles.com/files/1176636/train_sim_world_2_xbox_one_controls.pdfIn PDF document text
    • https://cdn.sqhk.co/wadelovelo/hb1geXx/zamuvasexilat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451945/normal_5fab7e73ef2f7.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/jiwisigetizoxif/1274408894.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_off0000e636.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE636 5336 bytes
SHA-256: 53e585ca7ea45332e8a7a45683a8f4567df7f721a91bfae3aec7dcd172ab7ecf
font_01_sfnt_off0000f864.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF864 10560 bytes
SHA-256: e33a034544f601106353f448c5edeef8dd48c4ad0466c1c4e694a1ccde86e0a0