Malicious PDF — malware analysis report

Static analysis result for SHA-256 d33ef03123508a36…

MALICIOUS

PDF

69.8 KB Created: 2021-02-26 00:48:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: ae40d08a482c679f1dca1ffe289f1408 SHA-1: d1223fb7ca711b7a1105e46c8ab16c5a08815525 SHA-256: d33ef03123508a368432fce98642e075c14e247be906ff9868a75a94b60df378
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 5

  • 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.
  • 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/award?keyword=jeep+uconnect+microphone+location In PDF document text
    • https://cdn.sqhk.co/savageven/ghYgcjb/lador.pdfIn PDF document text
    • http://nomenowunesazoz.scienceontheweb.net/is_dominos_garlic_parmesan_white_sauce_good.pdfIn PDF document text
    • http://labifovejes.mypressonline.com/sundance_optima_flo_error.pdfIn PDF document text
    • https://suxavumopej.weebly.com/uploads/1/3/3/9/133999634/9aa94a3f.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/bokofapig/12725073459.pdfIn PDF document text
    • https://s3.amazonaws.com/luworizesupox/38196420899.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/93725442593.pdfIn PDF document text
    • http://tuxefofoxomar.epizy.com/catholic_school_uniforms_hamilton_ontario.pdfIn PDF document text
    • http://motirusuxelowit.epizy.com/tixokibapamuw.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_off0000d655.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD655 4984 bytes
SHA-256: d5f9a9626081ac3dbcc4c2f9ceed6cb6fb6c6db9f876a30864b1098822543855
font_01_sfnt_off0000e71a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE71A 10392 bytes
SHA-256: 4c690afef301d8e4fc84c424510087aae6b1ef1b0eb764ca22532f7792440f9f