Malicious PDF — malware analysis report

Static analysis result for SHA-256 87f8e631e8f2d8f3…

MALICIOUS

PDF

77.8 KB Created: 2021-01-26 10:25:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: d9ad25dfd7bcaa6a64bc01c01b49cded SHA-1: 7327aafec50f7279c14f7114a4c27530f2459705 SHA-256: 87f8e631e8f2d8f3a5ad34514599ccf9936bf569cdabb36ca74d07e3d1779ccf
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://druttle.ru/wb?keyword=alien%20swarm%20reactive%20drop%20cheats PDF link annotation
    • https://mogefitinovodug.weebly.com/uploads/1/3/0/9/130969954/3127896.pdfIn PDF document text
    • http://compte-cmbretagne.best/carmageddon_max_damage_xbox_one_reviewm783w.pdfIn PDF document text
    • https://cdn.sqhk.co/vunalogivefu/ihjdiho/neon_chrome_vita_review.pdfIn PDF document text
    • https://cdn.sqhk.co/sunidoxil/jeLjgiJ/5k_to_10k.pdfIn PDF document text
    • http://baltika-trans.com/kubisevosivaxefewimidelukzv97.pdfIn PDF document text
    • https://cdn.sqhk.co/tukawezezo/miiTgcR/jawawura.pdfIn PDF document text
    • http://dhl-order.info/26782994631k9rt5.pdfIn PDF document text
    • https://cdn.sqhk.co/lupobikud/JPjegd9/55477524869.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/neporezofov/prepositional_phrase_as_adjective_and_adverb_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/rekavumifijopuwibajoj.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/gutubetogizutal.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/chess_games_free_for_windows_8.pdfIn PDF document text
    • http://rubuvajaroxe.epizy.com/ao_smith_takagi_tankless_water_heater_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/memexelu/apology_letter_format_to_teacher.pdfIn PDF document text
    • http://bujisovi.epizy.com/church_administration_software_free.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_off0000f353.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF353 5452 bytes
SHA-256: 1427289f367bde824a5868fca6acf74a727d803bfb829291c075e23c8b230c38
font_01_sfnt_off000105c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105C8 10752 bytes
SHA-256: e793767d968f4b0cfbf5f1a771e6ab336c90e9a8a5c6941111e0382d9332a5ff