Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca9da49c8144f8cd…

MALICIOUS

PDF

70.3 KB Created: 2021-02-16 23:01:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 5cbfe04cd9e1c44129a748be991c6f84 SHA-1: 165e85fa831fbe492929cd1b7f458bc99ef3bbc4 SHA-256: ca9da49c8144f8cdd2cd7981062bf035bebd1d9d4ab179717f14c72b28c58e7d
204 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://seumenha.ru/wix?keyword=hackear+grindr+xtra PDF link annotation
    • https://zapizurur.weebly.com/uploads/1/3/4/9/134900478/6309821.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484399/normal_5feb1a85684f6.pdfIn PDF document text
    • http://questotzvezd.space/galaxy_wallpaper_hd_4k_downloadxc5rc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481154/normal_5feee1759a972.pdfIn PDF document text
    • http://alteramaks.world/chemquest_24_answer_keydhv3e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464852/normal_5fed1ef08659d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375541/normal_5ff39d0ddd9ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451752/normal_5fd2a7ed83be3.pdfIn PDF document text
    • https://zumokijux.weebly.com/uploads/1/3/5/9/135966910/7038584.pdfIn PDF document text
    • http://present-mag.ru/how_to_study_for_step_1_imgamkcl.pdfIn PDF document text
    • http://blu-ital.space/bio_data_form_filem2otn.pdfIn PDF document text
    • https://wamexololizod.weebly.com/uploads/1/3/2/7/132712163/6e3a49ef338.pdfIn PDF document text
    • https://lumewogomor.weebly.com/uploads/1/3/4/3/134319436/buzerujexoju-sipufipejaw-gafikozifubosug.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://karatufi.epizy.com/44676653094.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_off0000d6cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6CD 4988 bytes
SHA-256: 6d394b3a3f027f84b088c665c695858de0f6acecaf8096da53d6684fea86282a
font_01_sfnt_off0000e7d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D5 10768 bytes
SHA-256: 324d298fa8d85020d3e9ad4e1cef36d9cb567714b0838d24a8bf9849f6504a4e

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