Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4f8a0dec29dfcaa…

MALICIOUS

PDF

70.4 KB Created: 2021-02-12 10:11:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 6afff447953ed965d0cddb403173dd25 SHA-1: ac425052189132b4aa2f235276106dd5ca8ed2dd SHA-256: a4f8a0dec29dfcaac0b24cf2e010242db8c8cc1430e9b48ea5a03bbafc8665ee
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=wishing+on+a+star+lyrics In PDF document text
    • http://domastmsk.space/sirope_en_inglesvdcj1.pdfIn PDF document text
    • https://xagiwejobumumok.weebly.com/uploads/1/3/6/0/136051235/bekobureku.pdfIn PDF document text
    • http://ludokebisiw.iblogger.org/lajel.pdfIn PDF document text
    • http://wumijodurixemi.22web.org/cnn_entertainment_reporter_salary.pdfIn PDF document text
    • http://tuguxanofa.iblogger.org/bombay_film_telugu_songs.pdfIn PDF document text
    • http://zatoboyvibor.fun/latest_telugu_love_bgm_ringtones6bboh.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386363/normal_5fe1a50b8f2be.pdfIn PDF document text
    • http://japancar-sib.ru/82903690866kxd3y.pdfIn PDF document text
    • http://antileqphh.site/bmobile_plans_top_uphfk9i.pdfIn PDF document text
    • https://tumotasefon.weebly.com/uploads/1/3/5/3/135317172/9a07d9a918d.pdfIn PDF document text
    • http://makikupake.iblogger.org/gajoroxofeninuxazu.pdfIn PDF document text
    • http://roflan.site/lowe_s_department_store_closest_to_memt72m.pdfIn PDF document text
    • http://good-production17.site/unity_create_animation_from_sprite_sheeth09fd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485703/normal_5fee890797ad4.pdfIn PDF document text
    • https://nonedavoxezi.weebly.com/uploads/1/3/5/9/135956696/bodanexuv.pdfIn PDF document text
    • http://ruwegekugite.22web.org/coliforms_in_well_water.pdfIn PDF document text
    • http://watertea.space/20754190272s857b.pdfIn PDF document text
    • https://neluposu.weebly.com/uploads/1/3/4/3/134369170/zujed.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://genenapukiral.epizy.com/60722056317.pdfIn PDF document text
    • http://repafow.epizy.com/zipigorisijejeneval.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_off0000d7ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7CA 5176 bytes
SHA-256: b1cca83fd9d6ee1d950fe56410f7d81b2d7ed39259fbb071471dd1271b7edbc4
font_01_sfnt_off0000e97a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE97A 10252 bytes
SHA-256: e637c07c185720c42b2b6a3bbfe4d3c261d5a9e74995749ef4db6225449bfe1c