Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a3a0eaee3b256dd…

MALICIOUS

PDF

71.0 KB Created: 2021-02-22 08:09:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 9495427d0379f65fedf93f98a0f3d7a7 SHA-1: 7363a85becbb7d45d3405e5375b605fabda61731 SHA-256: 7a3a0eaee3b256ddae9b6d1a74e1078c6ae84c9901c312427ac759dd1dad4383
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://maypoin.ru/wix?keyword=quadratic+graphs+worksheet+answers PDF link annotation
    • https://cdn.sqhk.co/tosobulig/gX0JPUc/icon_pop_quiz_fruits_answers.pdfIn PDF document text
    • https://ratopavitakam.weebly.com/uploads/1/3/4/4/134460251/a001bf1b0df.pdfIn PDF document text
    • http://zazegafila.22web.org/core_java_interview_questions_tutorialspoint.pdfIn PDF document text
    • https://cdn.sqhk.co/lewoxiguj/aYijxid/offline_music_streaming_app_for_android.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/ladiwuzetawedi/nukujikefunulok.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/piwesuriruk.pdfIn PDF document text
    • http://sorajapiliwixod.rf.gd/89728113947.pdfIn PDF document text
    • https://s3.amazonaws.com/sosupejuxofedo/70311512524.pdfIn PDF document text
    • http://zoribele.epizy.com/ahlan_wa_sahlan.pdfIn PDF document text
    • http://fiwepive.rf.gd/music_sheets_with_letters.pdfIn PDF document text
    • http://lasuwutiganije.rf.gd/radish_seed_germination_experiment_answers.pdfIn PDF document text
    • http://dokirapuxok.rf.gd/zekigivi.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_off0000d97a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD97A 5520 bytes
SHA-256: a0d30cb5cbefb7e990c1a5aca58190f4b60562068f73a4882ed8cdb2e0823654
font_01_sfnt_off0000ec49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC49 10308 bytes
SHA-256: 41255ea481ce0adf4e8e09bb5405da239a979d6c254f57a11e187d2bdffbcc6a