Malicious PDF — malware analysis report

Static analysis result for SHA-256 f158357888082f05…

MALICIOUS

PDF

70.5 KB Created: 2021-01-19 14:14:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: ee08e753643abdd604927be505c0d2db SHA-1: 5dcbd3d4b028a1ce8dff6645321316d49ff11fa8 SHA-256: f158357888082f056ecdc5eca3cec8dcdf5f2a04688972c0eb3d66f4cd5e48ba
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://leonvi.ru/wb?keyword=classical%20music%20ringtones%20iphone PDF link annotation
    • https://ranemexamegen.weebly.com/uploads/1/3/4/4/134440137/gututitimidatoxi.pdfIn PDF document text
    • https://cdn.sqhk.co/dodufiruw/8zvGhbo/wobasadomixudibubuxume.pdfIn PDF document text
    • https://cdn.sqhk.co/nukunudakiju/ixie0hd/30242697991.pdfIn PDF document text
    • https://cdn.sqhk.co/wuluzajiroz/dhbttjg/23763184313.pdfIn PDF document text
    • https://cdn.sqhk.co/vumorumuvogi/wiczOt2/device_care_app_samsung.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383925/normal_5f965513b880c.pdfIn PDF document text
    • https://zejafopo.weebly.com/uploads/1/3/4/5/134505046/wusonarexuvusi_jorex_liwis_niwakoraditen.pdfIn PDF document text
    • https://gumomamomav.weebly.com/uploads/1/3/1/3/131398069/fikot-falisomuwex-wepuxixugipa.pdfIn PDF document text
    • https://zezujigodet.weebly.com/uploads/1/3/4/0/134012897/9299172.pdfIn PDF document text
    • https://cdn.sqhk.co/zafupusapun/hEjc8gg/super_loud_notification_sounds.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376357/normal_5f935a3bb2f76.pdfIn PDF document text
    • https://lomofoxagut.weebly.com/uploads/1/3/4/5/134524577/3eddcce7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459645/normal_5fe4b44c4df70.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bibesatu.epizy.com/xijedumezob.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/10th_marksheet_2019_ap.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_off0000d6ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6FF 5252 bytes
SHA-256: c1a8e38eb6f5a9ed1d8d1575922df624f646f3b7019fffc503c81739effd4341
font_01_sfnt_off0000e8a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A9 10680 bytes
SHA-256: 8d756f3be45dfd4b6cbf857865e53fc7216545b037ed90346f4d6ae5213a454a