Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b9a15c5f01ec79b…

MALICIOUS

PDF

155.9 KB Created: 2021-02-19 05:46:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 8597109d7987f9996337743b24d5b4e1 SHA-1: e39575b2e747db4ba3acc4943498e33a99f1bcab SHA-256: 9b9a15c5f01ec79bc77eecb99eea4b84157d54ef9bc8ce1ada7d5f04f427b0a9
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was detected as malicious by multiple heuristics, including a critical finding for a link to known malicious redirector infrastructure. The document contains a large number of embedded URLs, many of which are hosted on disposable domains, suggesting a phishing or malware distribution campaign. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9516

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=tokyo+ghoul+re+op+1+roblox+id In PDF document text
    • https://static.s123-cdn-static.com/uploads/4470408/normal_5fef6994bd1cf.pdfIn PDF document text
    • http://verifybadgesbusiness.com/can_steam_while_playing9jxhu.pdfIn PDF document text
    • https://cdn.sqhk.co/nomitusibop/j3NMze8/smart_tv_50_inch_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/mifijizudi/hj9tCyA/foreign_policy_magazine_customer_service.pdfIn PDF document text
    • https://cdn.sqhk.co/woledibiroju/COihhgl/kaximilixufesilopikafud.pdfIn PDF document text
    • http://birjand.design/20371175110ijxz0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479705/normal_60090976bfa8f.pdfIn PDF document text
    • http://gouliwer.online/itunes_user_guide_2017tq4wl.pdfIn PDF document text
    • https://cdn.sqhk.co/vivupedasez/jabAibn/infection_control_jobs_near_me.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451940/normal_5ff9bba9e2441.pdfIn PDF document text
    • http://iranomics.com/prodot_antivirus_for_windows_109e91o.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446400/normal_602b9b120f576.pdfIn PDF document text
    • http://onlineeshop24.xyz/sydney_opera_house_tours_ielts_reading_answers6bhhj.pdfIn PDF document text
    • http://afracheat2.xyz/tevuvesakobejokitapowibusmz12.pdfIn PDF document text
    • http://wrinklestiltskin.com/easy_share_wifi_file_transfer_apk9d4t9.pdfIn PDF document text
    • http://forecast.bet/romantic_video_download_for_whatsapp_statusxabla.pdfIn PDF document text
    • https://furogareb.weebly.com/uploads/1/3/1/3/131397930/makejijesox.pdfIn PDF document text
    • https://bekogome.weebly.com/uploads/1/3/1/4/131454098/wupimakajava.pdfIn PDF document text
    • https://mugifafuvutasij.weebly.com/uploads/1/3/4/1/134108805/6509645.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/stihl_ms180c_bar.pdfIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/ruzuxezoxetufadatebo.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/9748809657.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 8

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018ca4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18CA4 6676 bytes
SHA-256: 73539583c34474f2ee939104b46720bb81c6798b6c66b67194b6d150af431f3d
font_01_sfnt_off00019d49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19D49 9308 bytes
SHA-256: ec09f823b16a97df637f68cd752ba76202186b660402461b20e205db6f8c13db
font_02_sfnt_off0001bcf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BCF7 4904 bytes
SHA-256: dd1972d841732d391eb26f9141d36ea3106d68dde8c60e537512c2fd0bfb1867
font_03_sfnt_off0001cdb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CDB1 9808 bytes
SHA-256: a5ac8c114bf2114326dad5a719a05fa3c49529ca131d79b4984fff5709718d79
font_04_sfnt_off0001ee63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EE63 17252 bytes
SHA-256: b1e2273748a60e90825b12a4606f39c37ff20c2c1a1a56667b1ee600cdfe3348
font_05_sfnt_off000223b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x223B4 18824 bytes
SHA-256: 899d48e7488efcbd05185879c0b02d8736484b86085164999de220b43d1becbb
font_06_sfnt_off000240d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x240D8 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
font_07_sfnt_off00024e9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24E9B 6092 bytes
SHA-256: ad74cc7364ebf866ca48cff8d00dc7655c358880c2b44803d0120f127bcbb363

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