Malicious PDF — malware analysis report

Static analysis result for SHA-256 408771abafbd4d71…

MALICIOUS

PDF

66.4 KB Created: 2021-03-02 19:22:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 135600448cc0a5a8c486a50373a09e5c SHA-1: 13d7bb4647b47f06947070b191cf9b6cf0142c13 SHA-256: 408771abafbd4d711723ef28345259f53fe1f3cf283b1875601e63e8f8d3b831
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://maypoin.ru/award?keyword=i+pilot+to+i+pilot+link PDF link annotation
    • http://loneresel.mygamesonline.org/61125311481.pdfIn PDF document text
    • https://cdn.sqhk.co/xegunorasu/Uwggjd9/40724228009.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495973/normal_5fd67412bd3ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494673/normal_601c7ab471c75.pdfIn PDF document text
    • https://cdn.sqhk.co/ratevusur/chgPqhb/31197998454.pdfIn PDF document text
    • http://pazujiz.mygamesonline.org/how_to_change_font_size_on_brother_p_touch_pt-70.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485454/normal_602088bb9b4b4.pdfIn PDF document text
    • https://cdn.sqhk.co/suwapipejob/zhfijhc/5427644247.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lilufunom.epizy.com/bsc_nursing_entrance_exam_form_date_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxexi/bogowigodumovagip.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/alejandro_jodorowsky_la_via_del_tarot.pdfIn PDF document text
    • http://xewabilema.epizy.com/kadofus.pdfIn PDF document text
    • http://gifimedirawi.epizy.com/viririfos.pdfIn PDF document text
    • http://vizepojuduw.rf.gd/99744537225.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/scholarship_rejection_letter_template.pdfIn PDF document text
    • http://vinegufoxa.rf.gd/ring_christmas_bells_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/adobe_after_effects_handwriting_animation_template.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_off0000cb9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB9C 4328 bytes
SHA-256: c08a21b2b55ce6e020e63724121402fd4cc96d18e426772552cb8d1f2302239b
font_01_sfnt_off0000da6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA6D 9948 bytes
SHA-256: d2674014b336e78ce62039426dd7e540903668e9381c056abf579284c1c4c4fc