Malicious PDF — malware analysis report

Static analysis result for SHA-256 185085cd31f8dad7…

MALICIOUS

PDF

74.7 KB Created: 2021-02-06 07:58:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 06faa1e5f80c0379e5edd09c46560434 SHA-1: fbca2804893763f73800169e4b8ca330c4f978c3 SHA-256: 185085cd31f8dad773de6813a75b7f9243fc2fe4144d2ba1444e2758a55b1ce2
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://yafferge.ru/wb?keyword=fl%20keys%20travel%20guide In PDF document text
    • https://static.s123-cdn-static.com/uploads/4407777/normal_5febaaed822d7.pdfIn PDF document text
    • http://devicesprotectionforusers.site/86359123782cst6b.pdfIn PDF document text
    • https://cdn.sqhk.co/nuwalimo/agjeDOv/vozava.pdfIn PDF document text
    • https://cdn.sqhk.co/gawagunikuw/Bgifahc/busum.pdfIn PDF document text
    • https://cdn.sqhk.co/votojuxosaf/ybghlgd/9684346838.pdfIn PDF document text
    • https://cdn.sqhk.co/durotula/ujgNhap/infinity_gauntlet_omnibus_hc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391899/normal_5fe2698381441.pdfIn PDF document text
    • https://cdn.sqhk.co/reruzemafow/aXjbzic/85705160327.pdfIn PDF document text
    • https://cdn.sqhk.co/pibexezases/jhbhbzo/the_impossible_quiz_book_chapter_3_hacked_unblocked.pdfIn PDF document text
    • https://cdn.sqhk.co/jedelamodafa/gsMic3x/end_of_days_1999_soundtrack.pdfIn PDF document text
    • https://cdn.sqhk.co/banifiga/hgkysgj/beat_the_boss_game_unblocked.pdfIn PDF document text
    • http://axecheat8.xyz/xesivifx526.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366969/normal_5fc7da31aba87.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/besafefaf/duxigavexew.pdfIn PDF document text
    • https://s3.amazonaws.com/nijudow/call_flow_diagram_visio_template.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/desosiredexulu.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/voremanuduvukur.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/59761211244.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_off0000e872.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE872 5172 bytes
SHA-256: 840044d7a0b5ab80a34d1a4461c922e66114f36c437f8c766a58abe00324df4d
font_01_sfnt_off0000fa2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA2B 10496 bytes
SHA-256: 5780b9a59bc172cd07b363290108975a0c8f85de397899ead022a2623a670fb2

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