Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5a92f682533f1c0…

MALICIOUS

PDF

45.4 KB Created: 2020-10-07 10:42:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: a6fc2978d9e76fd38e94a88a1176e242 SHA-1: e012b856d0379d0282ff987d3c33aeb96ada2ba7 SHA-256: b5a92f682533f1c03e4197b75dadc07ad804e85b836818877d2b0c684be02ec5
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://ggtraff.ru/pify?keyword=painting+classes+near+me+for+family In PDF document text
    • https://site-1039737.mozfiles.com/files/1039737/rusuzikutegimo.pdfIn PDF document text
    • https://site-1043158.mozfiles.com/files/1043158/miwukixopedabipelodimi.pdfIn PDF document text
    • https://site-1036730.mozfiles.com/files/1036730/60861441526.pdfIn PDF document text
    • http://files.huarennewstv.com/uploads/1/3/2/6/132681656/274ac051027.pdfIn PDF document text
    • http://files.relaxandsucceed.net/uploads/1/3/1/6/131637896/7e0d628488ed67.pdfIn PDF document text
    • http://kunuruku.breedengallery.com/uploads/1/3/2/7/132740829/7213947.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7aebae0-9ea1-4eda-b809-846292e0db9b/97321855162.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5964f571-9c34-4e9a-be2d-fdcdf22ffc49/50568855702.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/111b0b1e-e920-4d66-b549-c5d0deb69e0d/88231682136.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66225f1b-868f-4c76-bfbd-037b944e71b4/jorilojinafipabep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ec86caa-03eb-49a0-b131-8a7ae4a2df0e/82659644195.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e7f7d47-77fa-4776-a05c-5e1f2218370d/7994278195.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_off000072f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72F2 5304 bytes
SHA-256: e4e8388e416a5104d1f4d3d3fc21258e820454690a7cd76670acdfb4d5f95d2d
font_01_sfnt_off000084f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84F2 10532 bytes
SHA-256: 7cd77f79784034c9dad3dcbee5485943887279491e1ce26b8f1f7e7aca6a88ce

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