Malicious PDF — malware analysis report

Static analysis result for SHA-256 e831c1eba09eff38…

MALICIOUS

PDF

73.1 KB Created: 2021-02-22 03:01:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 13e80ba43c6f93d28e3a7e8ee8f29e71 SHA-1: c9ffd5f4356937c4d417a92a583cb93f8308c737 SHA-256: e831c1eba09eff387befdfed74de6d28d12815f63b1a451dce7b5c6cfaf5cb54
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://druttle.ru/wix?keyword=origami+turkey+napkin PDF link annotation
    • http://toximakuvox.iblogger.org/46556163891.pdfIn PDF document text
    • https://sowotelimavo.weebly.com/uploads/1/3/4/0/134000290/5819613.pdfIn PDF document text
    • http://katorewudejizut.22web.org/91074686254.pdfIn PDF document text
    • https://cdn.sqhk.co/pujixefan/Gzjeux0/vocal_training_to_sing_better.pdfIn PDF document text
    • https://poxovoxi.weebly.com/uploads/1/3/5/3/135398301/jipubojerijolefon.pdfIn PDF document text
    • https://cdn.sqhk.co/xobitabab/wiitwhd/99618145899.pdfIn PDF document text
    • https://cdn.sqhk.co/wepurodapike/BKDHdhb/drill_master_4._8_cordless_screwdriver_charger.pdfIn PDF document text
    • https://buxudirikebipur.weebly.com/uploads/1/3/1/1/131164004/1925622.pdfIn PDF document text
    • https://doxorovovo.weebly.com/uploads/1/3/4/4/134479089/taditufew.pdfIn PDF document text
    • http://zegoves.22web.org/fraction_division_word_problem_worksheet.pdfIn PDF document text
    • https://cdn.sqhk.co/vesagivara/GHU7Aig/71727988695.pdfIn PDF document text
    • https://cdn.sqhk.co/rufetuzek/a4GHheO/free_christmas_song_quiz_questions_and_answers.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/bolovopizonuki/lurusupigebujed.pdfIn PDF document text
    • http://zonadomafi.rf.gd/80815188057.pdfIn PDF document text
    • http://kitasavino.epizy.com/kofobovunid.pdfIn PDF document text
    • http://vobisobopimab.epizy.com/motakovonabaxozoviwedipe.pdfIn PDF document text
    • http://lewupidofiji.epizy.com/35507574282.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_off0000e282.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE282 5120 bytes
SHA-256: fd4a3629375ad61ece6bd2dc8097ed19852c2e29384f9b8cc44ea3e3500ed8b1
font_01_sfnt_off0000f3e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E6 10408 bytes
SHA-256: 991d739775fa45919c4750cab9f5cf4e0253f9def1a485b774c1765e3446a8bf