Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5153638b5e4f04d…

MALICIOUS

PDF

73.4 KB Created: 2021-03-01 04:56:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 9c0b1fcd465753ff4e241422120f16c9 SHA-1: 92d91ae34f0baaf1f153bc659bef9388b15851ee SHA-256: b5153638b5e4f04d1c95427beb81fcd89d0a253bf31b8bdf53eaf7b59ad36d5a
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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.
  • 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://yafferge.ru/award?keyword=culture+of+honor+danny+silk+pdf In PDF document text
    • http://lnstagram-helping-centre.com/auto_tune_during_live_performancene4n8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423427/normal_5fdfcfdb2e399.pdfIn PDF document text
    • https://cdn.sqhk.co/gadujotev/Kjhhggi/photo_wall_collage_kit_pink.pdfIn PDF document text
    • http://bioforce-co.site/simarezewipitegelusuwih0brt.pdfIn PDF document text
    • http://idealica-co.site/thermal_physics_c._kittelzyvkp.pdfIn PDF document text
    • https://cdn.sqhk.co/savunowudob/ohalhbf/12648726784.pdfIn PDF document text
    • https://cdn.sqhk.co/zujumatatub/djjhchi/mtb_downhill_multiplayer_revdl.pdfIn PDF document text
    • http://money-team.site/36513994968gntae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370528/normal_5fdaf789d2b00.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/analytical_essay_mla_format_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/how_to_reset_network_on_canon_printer.pdfIn PDF document text
    • https://s3.amazonaws.com/neviwove/xivavafol.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/69210338516.pdfIn PDF document text
    • https://s3.amazonaws.com/zoxewudunigus/beowulf_book.pdfIn PDF document text
    • https://s3.amazonaws.com/wovigebi/acls_guidelines_2017_ppt.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_off0000e4ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4ED 5200 bytes
SHA-256: 763138765ae329bea08a56b27cea250ade4c9155effbb8929f453c2d1b55eabd
font_01_sfnt_off0000f69c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF69C 10020 bytes
SHA-256: 992309e06ce410faed31cba843df8e0e8d04ddefae730e4fa2689f322b3ef4da