Malicious PDF — malware analysis report

Static analysis result for SHA-256 828a98ad9e8c444f…

MALICIOUS

PDF

63.5 KB Created: 2021-03-03 00:43:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: aa2298f6b759a81cb0f971dd0d651cdd SHA-1: 0a250d2403bab44a1ef72e80ed6055b1587164a3 SHA-256: 828a98ad9e8c444f6dd94061a31e699959aef7bfc0011ccab894a4936fbd03cf
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://dafemum.ru/award?keyword=a+christmas+carol+bbc+2019+trailer In PDF document text
    • https://cdn-cms.f-static.net/uploads/4469641/normal_603048d73ae47.pdfIn PDF document text
    • https://cdn.sqhk.co/kimazibo/ggujd6J/6686564507.pdfIn PDF document text
    • https://cdn.sqhk.co/kowaziwaso/a2gfrkA/44627048863.pdfIn PDF document text
    • https://cdn.sqhk.co/zijigemeworu/pDhdjb1/pba_league_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/bugolajoxodu/iEUifbO/42609498682.pdfIn PDF document text
    • https://cdn.sqhk.co/zurefaxenov/5dhjKJP/baxubominaze.pdfIn PDF document text
    • https://cdn.sqhk.co/velabolo/jeYihse/app_to_change_photo_background_color_for_android.pdfIn PDF document text
    • http://wigigokewadusad.iblogger.org/66915411861.pdfIn PDF document text
    • https://cdn.sqhk.co/lafuwexale/bFtBgeV/gelefa.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/zibenoroduzuw/wow_tbc_moonkin_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/bubisifapagefe/41121830961.pdfIn PDF document text
    • https://s3.amazonaws.com/xufoxorog/57639031400.pdfIn PDF document text
    • http://girigiroret.rf.gd/wpf_binding_stringformat_number.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_off0000bbb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBB7 5652 bytes
SHA-256: 1ce93f4b002e343fd81ca60e80f50c524a79040b6173971fc98527aa468ff9a5
font_01_sfnt_off0000cebd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEBD 9628 bytes
SHA-256: 7838b48ca3acaba8f069a95bf6e55967ee78e85be2cdb59b1c20c5877d8c1026

Open this report in the interactive analyzer, or submit your own file for analysis.