Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fab8185fa2909a6…

MALICIOUS

PDF

69.6 KB Created: 2021-02-24 13:45:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 87b8495c24adf784665fc8ce19d7297b SHA-1: e90616d6f645f4faa8277fc738b11d2383428733 SHA-256: 5fab8185fa2909a6810d404ccfb69b925d927d28045048606877f9c40773d6f6
202 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.
  • 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
  • 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/wix?keyword=google+services+framework+apk+for+redmi+6a In PDF document text
    • https://cdn.sqhk.co/fajaleniwa/6ieTTER/game_recording_software_windows_8.pdfIn PDF document text
    • http://topmassage.net/bless_online_freehfide.pdfIn PDF document text
    • https://cdn.sqhk.co/wifukatar/idfihea/49254147937.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374851/normal_5fec4d46227c5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383573/normal_5ff3e52cd6f8b.pdfIn PDF document text
    • http://rumukisizupew.iblogger.org/adsorption_meaning.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/gezizefefififa/free_google_sheets_calendar_template.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/99022512964.pdfIn PDF document text
    • http://bezukovopobav.epizy.com/sizibew.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibudasagas/caregiver_authorization_form_california.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/riveviwetegarokijaluzir.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/25134641753.pdfIn PDF document text
    • http://turegipamikum.epizy.com/pravastatina_dosis.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_off0000d24d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD24D 5876 bytes
SHA-256: 14e22c9286d53e49b684da709f1f91bad0502bad70914502a67d2c5fc069339f
font_01_sfnt_off0000e660.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE660 10716 bytes
SHA-256: d9973d4e7b2e1c422f17b1b43b8e4db35541e517525ea918fa80aa9f3d00df12