Malicious PDF — malware analysis report

Static analysis result for SHA-256 08259b2c9ff5da56…

MALICIOUS

PDF

70.7 KB Created: 2021-02-09 08:07:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 199a65b799e9d79d71aeee7ae66fd462 SHA-1: 1e8373d38772b2446ab834bba5599bc17ed86bd4 SHA-256: 08259b2c9ff5da56d62a9e44b7d3ba1c056580698b0f718ed89cdc56e9def6ea
254 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/123?utm_term=monologues+from+little+mermaid In PDF document text
    • http://lienforkid.com/538671355597bm71.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408721/normal_5fef670e729dd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461523/normal_5fdd60d053d28.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386330/normal_5ffabfbdaa13c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478683/normal_5fdec3ee9972f.pdfIn PDF document text
    • https://cdn.sqhk.co/kenipafitu/2jdVpVL/80427108265.pdfIn PDF document text
    • https://cdn.sqhk.co/zepipawetopi/ee8tqOK/download_stormblades_apk_uptodown.pdfIn PDF document text
    • http://stixlife.info/oregon_blacktail_archery_season9r1k4.pdfIn PDF document text
    • https://jepukarebav.weebly.com/uploads/1/3/5/3/135321711/4308684.pdfIn PDF document text
    • http://voicebftyi.com/carel_pgd1_user_interface_manualrvcyb.pdfIn PDF document text
    • http://ubzvp.com/gw2_map_completion_guide_20208iify.pdfIn PDF document text
    • https://bopidojosonek.weebly.com/uploads/1/3/1/3/131384153/tujisifexonolat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386829/normal_5fd68db75fbaf.pdfIn PDF document text
    • https://tolawururajetam.weebly.com/uploads/1/3/4/8/134883146/2838b.pdfIn PDF document text
    • https://cdn.sqhk.co/bogijifaviba/lihe2fK/brain_it_on_level_32_solution.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403946/normal_5fc62c381b14c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wotolag.epizy.com/fodojaxexakigir.pdfIn PDF document text
    • http://bavidatesudujig.epizy.com/bedezuwuvidegu.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_off0000d9e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9E3 5232 bytes
SHA-256: 48ef0345a9932042f85a0a22c7b542a16c291fa617e8c927908671a6128c2bbd
font_01_sfnt_off0000eba0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA0 10072 bytes
SHA-256: 62ef0765c15486f4df921927367a24eb9edb9bdc2fe783ec22bca8f7fd5db042