Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ae4dfffc42dac5f…

MALICIOUS

PDF

142.2 KB Created: 2020-11-11 03:05:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 9241612aee94cf3093f7851809f9af12 SHA-1: 4aa87e6eac063ad8ef2eecf363a60fbaffc91020 SHA-256: 9ae4dfffc42dac5fa981ba1bab06765d2991a19bccafce847437949494ff9554
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • 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://gettraff.ru/aws?keyword=areas+of+knowledge+at+uw In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370299/normal_5f8aa6e68d5d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368265/normal_5f8cc09b91c20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416316/normal_5fa949f1486d6.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/gewuwasi/31716046302.pdfIn PDF document text
    • https://s3.amazonaws.com/kigavanus/56665680373.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46b63c5c-381a-46ab-a0cd-989cbfcafce6/free_church_plays_for_children.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/pathfinder_bestiario_2_download.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/unc_thread_size_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/18_wheeler_3d_game_download.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/72943379060.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/business_law_notes_for_bcom.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_off0001f5b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F5B3 5220 bytes
SHA-256: 53d5bbaaad4b93a4b38bbac360561615384a429d086ce5c290f843e261b161b9
font_01_sfnt_off0002079a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2079A 10600 bytes
SHA-256: 3d186f825bc539a3b3f309f5b994ea508056dab0f8a3843f29c7f03f4b3887ed

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