Malicious PDF — malware analysis report

Static analysis result for SHA-256 4243b50fa2e63522…

MALICIOUS

PDF

67.4 KB Created: 2021-03-15 19:56:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 2cd86b302662c4774b875d859f5ae921 SHA-1: 339f48c22f4ec913001d076529ad0d172dfa0afd SHA-256: 4243b50fa2e635220c6c46c119188e4c19c0282499e7c372edd90274820d2042
126 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
  • 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://gimoguvi.ru/award?keyword=portuguese+english+bilingual+visual+dictionary+pdf PDF link annotation
    • https://cdn.sqhk.co/pumopijaku/cifhbjV/baldi_s_basics_1_year_birthday_bash_wiki.pdfIn PDF document text
    • https://resusogid.weebly.com/uploads/1/3/5/3/135346187/f668718b9f400.pdfIn PDF document text
    • https://cdn.sqhk.co/sabeludejem/jfGOjib/nasid.pdfIn PDF document text
    • http://fasodotujane.iblogger.org/26038405353.pdfIn PDF document text
    • https://tuberosaguxe.weebly.com/uploads/1/3/1/4/131437792/a6e92eccf5270f7.pdfIn PDF document text
    • http://chtotakoevuxom.biz/buriwuripitebezn15a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421783/normal_5ffc477a01132.pdfIn PDF document text
    • http://lidzadva.xyz/man_in_the_high_castle_season_1_finale_redditnz4xi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412891/normal_5fe0a58130be6.pdfIn PDF document text
    • https://cdn.sqhk.co/xuwadezab/yTLngjS/mercury_retrograde_october_2020_leo.pdfIn PDF document text
    • https://bemazinava.weebly.com/uploads/1/3/4/8/134890863/1867205.pdfIn PDF document text
    • http://vsedlyatebya.xyz/chinese_zodiac_chart5a88w.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fexotupakel.rf.gd/wf-2630_print_head.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ef76eed-4d95-4375-82ae-676fefece024/skyrim_special_edition_skyui_not_loading.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8fa2ccf-b9a3-48b1-a2b5-a2121146ca38/86285898109.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b537c1d0-8051-4b41-a99f-5354e1d5074f/ge_spacemaker_xl1800_microwave_not_heating.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/192e1ec5-77b2-427c-83fb-b04ce84601a1/what_did_capitalism_and_communism_have_in_common.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_off0000c931.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC931 5720 bytes
SHA-256: 4c17b44284f9e1e86fecc8777fb983d4bf6e4b261ec4caf0be1f8bc3cf355390
font_01_sfnt_off0000dcae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCAE 9972 bytes
SHA-256: 5dbfceea08fbeed52f6c4ae7004a3a5997adc134704e38aba83269ff19e75657