Malicious PDF — malware analysis report

Static analysis result for SHA-256 401ea33cfb9866c0…

MALICIOUS

PDF

65.1 KB Created: 2021-02-19 12:58:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: e6f6687ae6e590eeba0b8a0f383ed483 SHA-1: 2c97bfd625bdb5f21c45b067691ea8b34720ddeb SHA-256: 401ea33cfb9866c00e1128291802476aa622484dd4c1f323f857ba31adb13037
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://baarspo.ru/wix?keyword=chapter+10+mastering+chemistry+answers PDF link annotation
    • http://pollsexpert.com/infosys_lex_assignment_answersg33nw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449419/normal_602e49c9056d8.pdfIn PDF document text
    • http://grinallex.shop/triggers_marshall_goldsmithxqqlm.pdfIn PDF document text
    • http://nigamenivikuki.iblogger.org/audi_a5_sportback_2018_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374853/normal_5fdc4c8be6882.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470687/normal_5ffb4f007313d.pdfIn PDF document text
    • http://bumaga.bz/boy_sad_shayari_wallpaper4m4se.pdfIn PDF document text
    • http://bobixuposu.22web.org/catholic_evening_prayers.pdfIn PDF document text
    • http://malespw.xyz/blossoms_of_the_savannah_study_guidewxjbq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vulomalizekuvu.rf.gd/barfi_songs_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/rom_lg_l39c.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/design_and_analysis_of_algorithms_mit.pdfIn PDF document text
    • http://rujemivegelap.epizy.com/holmes_tremor.pdfIn PDF document text
    • http://lulojoduvos.epizy.com/grandstream_ucm6510_ip_pbx_datasheet.pdfIn PDF document text
    • http://junenizexi.epizy.com/gitlab_ci_dependencies_manual.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_off0000c32d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC32D 5608 bytes
SHA-256: 999fac89ab649dcb3996f1b924893d9cf562efe69cb43149ec2d7208ef7f9311
font_01_sfnt_off0000d632.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD632 9700 bytes
SHA-256: 3502dbae059b4964bb8ab0881fb9e03f6cfee89bca693cb6c2bdf9871a480238