Malicious PDF — malware analysis report

Static analysis result for SHA-256 361b1c598267af3d…

MALICIOUS

PDF

71.3 KB Created: 2021-02-15 21:11:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 6769b3364ad86e2c55bb118a4ec19835 SHA-1: 116152e361757766e26bf03fc1eb41d26b5402f3 SHA-256: 361b1c598267af3da0040492591829f2a5beda9117d63043dc0dc3e207b41284
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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.
  • 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=ez+server+guide In PDF document text
    • https://cdn.sqhk.co/jigugabopu/RlYjhjh/23701465243.pdfIn PDF document text
    • http://ionatr.fun/ragepi1g8k6.pdfIn PDF document text
    • http://bit7.top/dilomosuwlxgr.pdfIn PDF document text
    • http://salopkisa.website/nigejepekivobapkm2ta.pdfIn PDF document text
    • https://kajipeluvo.weebly.com/uploads/1/3/4/3/134318391/bugivusitigez.pdfIn PDF document text
    • http://uscreditcheck.info/zkteco_k40_attendance_management_softwarez3cge.pdfIn PDF document text
    • http://xonajagavasuj.22web.org/wenepusojuludol.pdfIn PDF document text
    • https://fimuvuxufubewi.weebly.com/uploads/1/3/4/4/134442536/sepakaju.pdfIn PDF document text
    • https://kuzeloxowew.weebly.com/uploads/1/3/4/3/134330257/tuwodebesewumafowuk.pdfIn PDF document text
    • https://cdn.sqhk.co/jomububorava/xaLjeNC/free_download_wondershare_photo_collage_studio_registration_code.pdfIn PDF document text
    • https://latafixewikokaj.weebly.com/uploads/1/3/4/6/134687196/7609716.pdfIn PDF document text
    • http://lovechat24.club/metal_slug_3_xbox_360_backwards_compatibilityexqc9.pdfIn PDF document text
    • https://livesagu.weebly.com/uploads/1/3/1/4/131437401/gilov.pdfIn PDF document text
    • https://wuwenesugujiku.weebly.com/uploads/1/3/0/7/130739695/ea789c949a3e0f7.pdfIn PDF document text
    • https://cdn.sqhk.co/fasisela/DAijpjb/kidizigewepitowuzu.pdfIn PDF document text
    • http://penaleduduzib.iblogger.org/jezoraz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kesekerezox.epizy.com/view_source_mobile_android.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_off0000dc8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC8E 4820 bytes
SHA-256: caf433568276ec2a3e2da1ec6576335d03fbaaa00f6a075daff073cb9a81a693
font_01_sfnt_off0000ed13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED13 10492 bytes
SHA-256: 3c7227a053ed802ff65786c83d3bc351273d314ce4204cecbb837e8b40729006