Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fb6d797838680d1…

MALICIOUS

PDF

77.5 KB Created: 2021-02-12 06:48:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: ad77b629a242bfd52ec03fa3f4b42f8a SHA-1: 59467a2e6f92491c5aa8a3371197bfce377c34be SHA-256: 7fb6d797838680d1ab4416b5adb7839a9d803dde78066f42771556db9052ed73
234 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/wb?keyword=ashampoo%20movie%20studio%20pro%202%20%20free In PDF document text
    • https://static.s123-cdn-static.com/uploads/4529095/normal_5fde05187b6d7.pdfIn PDF document text
    • http://katowad.22web.org/devirexunugevokariginam.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391599/normal_5ff37aba7bdba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368240/normal_6016936420b1e.pdfIn PDF document text
    • http://bcpzonasegura10beta-viabcp.com/30583890573iilj8.pdfIn PDF document text
    • http://otomail.business/7485320736ea6ah.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383928/normal_60006a0a9ebbe.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/zetituri/child_protection_register_form.pdfIn PDF document text
    • http://kifowusaw.epizy.com/mugen_rao_images_with_quotes.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/5737741293.pdfIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/chalkboard_se_font_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kavifunaruvi/dajugupamolig.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/xilemizixituwojidilorusiv.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/zojulutajonaduwif.pdfIn PDF document text
    • https://s3.amazonaws.com/xupizewuxere/mejobel.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/havoc_brothers_album_songs_free_starmusiq.pdfIn PDF document text
    • https://s3.amazonaws.com/tikoweravisixu/capture_nx_d_manual_cz.pdfIn PDF document text
    • http://puligop.epizy.com/24545330924.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_off0000f0a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A9 5432 bytes
SHA-256: 1137ec47e0c54cbb7e43a397085c601392158a58843bdac60dcab8ac65f0dd51
font_01_sfnt_off00010303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10303 11084 bytes
SHA-256: 4ffa680d5a6e0a2c24f7a4c1d4b46404e048e9bc68ca7ac8a5d86d234247f833

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