Malicious PDF — malware analysis report

Static analysis result for SHA-256 6945e9cbbce0f8cd…

MALICIOUS

PDF

61.5 KB Created: 2021-02-09 19:23:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 72d17b5b9b11f99596d43f1dcfabae34 SHA-1: 24abbec7e2f57a2ea722d584b132e0d5c8107276 SHA-256: 6945e9cbbce0f8cde5de4478225c0c6556d7ff0b9f8d2b2e7fd52991231e8f64
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://jottigo.ru/aws?utm_term=german+camera+maker+crossword+answer PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4497356/normal_5fd9e6fda0d20.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389095/normal_5feee6aa679a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409840/normal_5fe6d4a90ad7e.pdfIn PDF document text
    • https://cdn.sqhk.co/vetukalujir/lihKGij/average_walking_pace_for_5k.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380523/normal_5ff70f91a6729.pdfIn PDF document text
    • https://tobadagagu.weebly.com/uploads/1/3/4/7/134750152/pofed-lovevav-tomelosok.pdfIn PDF document text
    • https://libufuvebugun.weebly.com/uploads/1/3/1/4/131406816/5345300.pdfIn PDF document text
    • https://cdn.sqhk.co/manuguwe/P1zYZig/47804623794.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401505/normal_600326fdb0c64.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404739/normal_5ff1167bc94bc.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/gaxuremewuger/xowup.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/83561875518.pdfIn PDF document text
    • https://s3.amazonaws.com/damerirazib/criminal_songs_free_doregama.pdfIn PDF document text
    • https://s3.amazonaws.com/sogovekevi/beef_and_beer_flyer_template.pdfIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/harry_potter_theme_clarinet_sheet_music.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_off0000b68d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB68D 5240 bytes
SHA-256: 92e6490048379bebb8cf81aefd1710fafde486ec68cfdb577e1d0614a013c2c5
font_01_sfnt_off0000c859.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC859 9668 bytes
SHA-256: 9c0c76011d501d601f4dab1522648b249166a15cc25aa0fa19bb2dd8c8dcfda2