Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7168647d8e3bc63…

MALICIOUS

PDF

75.3 KB Created: 2021-02-26 01:22:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: a3adcd885e1caf671398471b74eae590 SHA-1: 9423c9b810102f6a6ab47d7ce35f119dde69732c SHA-256: b7168647d8e3bc631e01fd0f66cb6e71190085dedc2a92a244dfd4242101d685
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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/strik?utm_term=new+construction+building+inspection+checklist In PDF document text
    • https://cdn-cms.f-static.net/uploads/4413697/normal_5fd2603c81d64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367310/normal_60244cdc6a4c3.pdfIn PDF document text
    • http://cooldomen.space/40377181395g8jps.pdfIn PDF document text
    • http://instapresent.site/70339871405u02wk.pdfIn PDF document text
    • https://cdn.sqhk.co/wudawagirus/10hihjj/clash_of_clans_attack_strategy_th9_war.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420237/normal_5ff408b050b94.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495387/normal_5fdd76230a87b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369503/normal_5ffb5cc4ab60a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453329/normal_5ffb20ccebfc3.pdfIn PDF document text
    • http://itravelgr.com/bum_chiki_bum_bum_songbtbt2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413705/normal_5fd78734d9562.pdfIn PDF document text
    • https://cdn.sqhk.co/tamaladafa/aFhbfJK/13076508133.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412154/normal_600668cfd8dfc.pdfIn PDF document text
    • https://cdn.sqhk.co/fubafonu/5Giaiib/ruvujajejonetewafoxig.pdfIn PDF document text
    • https://cdn.sqhk.co/soxuvezosapa/hijhhok/annoying_ringtones_laughing.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvebopeweb/lijhjgh/mojoworiponixez.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/besafefaf/r._c._e._m_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/baarish_song_apk.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_off0000e908.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE908 5388 bytes
SHA-256: 2dc48bed71daf3a07260cacd65f6e8056a27716415264791e73249fa9f393730
font_01_sfnt_off0000fb67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB67 10812 bytes
SHA-256: 6e7b6cb3401c8fabf7597f714f7036a2598e39dda2bd28f213efe1141bf8639b

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