Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dbde12cf84bf1f5…

MALICIOUS

PDF

68.5 KB Created: 2021-02-14 05:30:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 705623fec99f21646c0cc4df4b426e37 SHA-1: f6c7e5a590c6a4add6b672b17917cd5840de31ab SHA-256: 5dbde12cf84bf1f52a5ba3e24cd57f3c76e44696a8963f1b6b51778b7d32148e
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/wb?keyword=english%20mixed%20tenses%20exercises%20with%20answers%20doc PDF link annotation
    • https://fipuwetula.weebly.com/uploads/1/3/3/9/133997959/gorezika.pdfIn PDF document text
    • https://cdn.sqhk.co/levowexesu/3sydigW/bare_knuckle_fight_club_watch_online.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460473/normal_5fe1583be084f.pdfIn PDF document text
    • https://cdn.sqhk.co/sunalikefazo/9VLgfQd/96438481020.pdfIn PDF document text
    • https://cdn.sqhk.co/giruzegovu/aghv5ja/xujifufuxedotevobezogo.pdfIn PDF document text
    • https://cdn.sqhk.co/buzomesil/siiafic/27320410544.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450353/normal_5fd28dffb0ddd.pdfIn PDF document text
    • https://tugesarafexo.weebly.com/uploads/1/3/5/3/135319839/7026111.pdfIn PDF document text
    • https://cdn.sqhk.co/xiwapusumoge/iiaigtp/vice_news_venezuela_youtube.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388271/normal_601c9bfc3c116.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/babuxufarizuxur/abbyy_finereader_12_professional_keygen_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jizubisetebof/8872287621.pdfIn PDF document text
    • https://s3.amazonaws.com/dezajok/zemana_antimalware_free.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxepiduded/servidor_webdav_android.pdfIn PDF document text
    • https://s3.amazonaws.com/tigewibejageju/canto_canario_da_terra_metralha.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_off0000cd54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD54 5468 bytes
SHA-256: 63ca2b719159be995aa0e6119ca74dc3904af05f163cccfff5c5e11c70c566cb
font_01_sfnt_off0000dfda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFDA 10976 bytes
SHA-256: 961c6dc3e6469a624e94017e4a7f00fccd49d13966d06842887cc69ab7a0e473