Malicious PDF — malware analysis report

Static analysis result for SHA-256 75ade3e8ecb00991…

MALICIOUS

PDF

69.9 KB Created: 2021-02-22 03:00:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 3389c5ae74d3aa2392656afaf17202f0 SHA-1: dd9b9edf278c1e892f5ccaf1eeb183eb2dcd7f6e SHA-256: 75ade3e8ecb00991814c4449794a2458ec51b952e03bdbd40add1fe244cb4103
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/wix?keyword=synergy+hl2+guide In PDF document text
    • https://static.s123-cdn-static.com/uploads/4482418/normal_5ffdf7008a071.pdfIn PDF document text
    • https://jelebemurufipo.weebly.com/uploads/1/3/4/4/134442628/4495789f3bb767.pdfIn PDF document text
    • https://cdn.sqhk.co/woxemevimox/d5jflhb/noob_vs_pro_vs_hacker_2_jailbreak_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450731/normal_5febfb9dd9d3a.pdfIn PDF document text
    • https://gifaxopolipo.weebly.com/uploads/1/3/0/7/130739444/rezoxedug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420034/normal_5fdc32eb79903.pdfIn PDF document text
    • https://sizelelam.weebly.com/uploads/1/3/4/8/134867910/fajexizuwes-rafem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473064/normal_6012089b291ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388177/normal_6010e31d73987.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375356/normal_5ff48de62bcf6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405642/normal_600322a33a042.pdfIn PDF document text
    • http://famafivas.iblogger.org/beneficial_ownership_secure_search_system_act.pdfIn PDF document text
    • https://cdn.sqhk.co/lewoxiguj/ejbgjo8/sefenibiga.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wesaloxovep.rf.gd/are_bake_elements_universal.pdfIn PDF document text
    • http://tovezujatim.rf.gd/80041481763.pdfIn PDF document text
    • http://doborokozudu.epizy.com/10633649966.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_off0000d726.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD726 5036 bytes
SHA-256: bd6069a55ba0099651fdfa99f51cf5f0e1f9eee62b729b34922451993c68c2cd
font_01_sfnt_off0000e84b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE84B 10240 bytes
SHA-256: efe37df8270d3e741393c8cc3eed4efe8f6098569d6641fff424581189784612

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