Malicious PDF — malware analysis report

Static analysis result for SHA-256 73a9e10582162a51…

MALICIOUS

PDF

68.3 KB Created: 2021-02-20 00:09:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: e0888e5c429551b26aa6f9059843ce34 SHA-1: 0c8b4fb6dc8a51340a35326f0c72546fb2825de9 SHA-256: 73a9e10582162a5115847c2a35dc6b5eaece31b635c994dda764b30dc15966bf
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=slither.io+apk+download+uptodown In PDF document text
    • http://load-bcp.com/jokagavakujonurajukoxkna5g.pdfIn PDF document text
    • http://julubavixukab.66ghz.com/creature_in_the_well_archives_guide.pdfIn PDF document text
    • https://gamitodotabezoj.weebly.com/uploads/1/3/1/4/131453651/abbcc6753.pdfIn PDF document text
    • https://cdn.sqhk.co/mewoveri/UCDgjha/90149703068.pdfIn PDF document text
    • http://kpovli.ru/allluia_de_taiz_partition8ewo5.pdfIn PDF document text
    • https://pifabesi.weebly.com/uploads/1/3/5/9/135958575/gimux.pdfIn PDF document text
    • https://cdn.sqhk.co/bepesewutu/NhbPhfQ/2466220134.pdfIn PDF document text
    • https://mimuromujalu.weebly.com/uploads/1/3/0/7/130739347/5bd298f6f4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lovibora.epizy.com/agenda_template_with_times.pdfIn PDF document text
    • http://xixonuw.rf.gd/the_magicians_season_4_episode_10_imdb.pdfIn PDF document text
    • http://bikutuvuxaxixo.epizy.com/android_version_update_list.pdfIn PDF document text
    • http://rubuvajaroxe.epizy.com/98847136143.pdfIn PDF document text
    • http://nawaroxepemif.epizy.com/how_to_do_vocal_warm_ups_on_piano.pdfIn PDF document text
    • http://kubunixa.epizy.com/tipovagixaviwu.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB779 5160 bytes
SHA-256: 02290f8ae24b89d43b4a7f4106f16ef8ad994956e19668b6238a69bc839e982f
font_01_sfnt_off0000c90d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC90D 10728 bytes
SHA-256: 551c13b8b8a8c286acc3ce9ef66cf6a5b73017d644f530331593b2b513a124b3
font_02_sfnt_off0000ec57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC57 16468 bytes
SHA-256: aa27204ca3f0358b489857ef1c285f78ab075e17c32b11073b4f18234a991a34