Malicious PDF — malware analysis report

Static analysis result for SHA-256 d728a139fe1a6cf0…

MALICIOUS

PDF

73.3 KB Created: 2021-01-28 15:08:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 5b1a6e903ba9f9b3c7499601659f8a00 SHA-1: 8276469d9230e5032e0169497e9bf87575ca9286 SHA-256: d728a139fe1a6cf04693367c6835467573dd5527bb753cb48cbb83c7b3b3fbed
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/aws?utm_term=previous+employment+history+template PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4377125/normal_5fce990b6723b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379029/normal_5fd88ee26da84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486036/normal_5fd9681230ab8.pdfIn PDF document text
    • https://cdn.sqhk.co/xafiguzi/hbQkEge/kitchen_story_cooking_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/fenazijeguk/MgfTOji/stick_war_legacy_2_game_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368223/normal_5fd374fd508bf.pdfIn PDF document text
    • http://lnstagramverifiedsbadgeforms.com/zofituvitvjheo.pdfIn PDF document text
    • http://community-day.ru/57287567082b8tbf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457876/normal_5fcf0c6de0296.pdfIn PDF document text
    • https://cdn.sqhk.co/guwewaxa/Pha8ji7/s10_ringtones_xda.pdfIn PDF document text
    • https://cdn.sqhk.co/xemugugafot/ihvFRge/radio_malayalam_movie_cast.pdfIn PDF document text
    • https://cdn.sqhk.co/xutazazo/hQhj3Zn/31129112245.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484805/normal_5ffac5e921137.pdfIn PDF document text
    • https://cdn.sqhk.co/zesuxetirano/heiaI2j/gesalavagarip.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/tazopaju/30027549842.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_off0000e167.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE167 5220 bytes
SHA-256: 9c0a5aafd7c94ce00686731dd18dedbf0c62664752452bcfaf34d37d248fe38a
font_01_sfnt_off0000f306.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF306 10892 bytes
SHA-256: 312cd836b0704dd1d5aeaa33f9dbc85c177bfd473f671834d61d8f35cc2a64f1