Malicious PDF — malware analysis report

Static analysis result for SHA-256 43cfd2768a0d782d…

MALICIOUS

PDF

71.8 KB Created: 2021-02-20 19:10:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 8343555f7bdaa1433462408cf1db4402 SHA-1: 7523f89e72c6fadd1b0c33dd9d1a3efd9d3c5690 SHA-256: 43cfd2768a0d782db6c08127a965aa6684d5e8d6961f083d68bdff6665c787b1
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://crophysi.ru/wix?keyword=dmv+manual+california+spanish In PDF document text
    • https://static.s123-cdn-static.com/uploads/4452193/normal_5ff7618237d01.pdfIn PDF document text
    • https://cdn.sqhk.co/merabuvi/JhfjheQ/mumofok.pdfIn PDF document text
    • http://tuworiki.22web.org/action_video_effects_free.pdfIn PDF document text
    • http://repuvelu.22web.org/excel_merge_data_from_multiple_sheets_vba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487623/normal_6004c099c7c4c.pdfIn PDF document text
    • https://cdn.sqhk.co/lukizigerex/bAjcgcj/mafovete.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365628/normal_5fc8503929a86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451355/normal_5fd13e3adf0b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383131/normal_601d657e2e745.pdfIn PDF document text
    • http://begezuwoxinum.iblogger.org/33370373320.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365659/normal_5fdc82167fdb0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403563/normal_5fdd9574af707.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389354/normal_600d10268446f.pdfIn PDF document text
    • http://fomilexavekol.22web.org/44031028973.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453888/normal_600789f0176f1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mujunuge.rf.gd/mission_impossible_2018_imdb_parents_guide.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c6b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6B3 5316 bytes
SHA-256: d3ac7f42c3617d21905ee7966dd1e30a0cf1fdf2e731bf8b9a0538e5b242551f
font_01_sfnt_off0000d8a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A9 10520 bytes
SHA-256: 6dd4e4a0241ec4c4e34f5b53bba52071e78b1657036d46debc5afbcddb3387a7
font_02_sfnt_off0000fce8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE8 16208 bytes
SHA-256: c691c2dc236ff1c3149f8178f30dcb30456d959af2bd230901b395ad55359d31

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