Malicious PDF — malware analysis report

Static analysis result for SHA-256 d01650c1dff91e91…

MALICIOUS

PDF

72.8 KB Created: 2021-02-28 09:51:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 42352f36dc23adfd39932f24d4b2423f SHA-1: 05e3df2f3fb0ae09bb08c9fba4f496543777258d SHA-256: d01650c1dff91e91c316d2ece8583998802064ff62ff67970dfa4238f5723eff
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://lozipotod.ru/award?keyword=quick+summary+of+13+reasons+why+season+3 PDF link annotation
    • https://cdn.sqhk.co/putuziboki/gjeLjjX/papers_please_online_free_no_download.pdfIn PDF document text
    • http://teagreen.space/62581129322a8wzu.pdfIn PDF document text
    • https://cdn.sqhk.co/zowonefaso/zoGgcjb/42795231237.pdfIn PDF document text
    • http://fastnoutservice.ru/sasesalafagobajomgu3l.pdfIn PDF document text
    • http://ionatr.fun/mefawixipamasiluvodakdo1ea.pdfIn PDF document text
    • http://fastgetme.online/what_is_the_fundamental_trigonometric_identity9oajf.pdfIn PDF document text
    • https://xedutorapul.weebly.com/uploads/1/3/0/8/130813372/kinigabuvazufewozil.pdfIn PDF document text
    • https://cdn.sqhk.co/sotatixorawi/JgdCid7/radio_92._7_fm_online_curacao.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426066/normal_5fcb0fb697a8f.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/debiwelof/24129443025.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/summary_appraisal_report_form.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/bermuda_triangle_map.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/tenug.pdfIn PDF document text
    • https://s3.amazonaws.com/lopeteb/fibuwenigadozup.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_off0000e0ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0AC 5624 bytes
SHA-256: 2c3ad30b45be8a2ec7767e12c5cf3c6e2fa95fac72ffc65487a1b2f049bc7199
font_01_sfnt_off0000f3d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D0 10136 bytes
SHA-256: 358ca5236902f9942a900ea41e9910badc9c288c40b2a208b60997530b822e6b