Malicious PDF — malware analysis report

Static analysis result for SHA-256 0063fe7ef4e4fdc0…

MALICIOUS

PDF

90.6 KB Created: 2021-03-31 16:01:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 7eb5d0f888626e2b1f3332832e56fcbc SHA-1: 8e40d240b85dcb900be9d0e8ec9571716d3b0277 SHA-256: 0063fe7ef4e4fdc0a6afa56ef939c2e2d1fcc764fb375a99906a824bfb8eb084
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, contains metadata related to its creation, but no direct instructions or lures are clearly discernible.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://jacksth.ru/wix?keyword=fancy+mouse+color+genetics PDF link annotation
    • http://tafugegajotu.mygamesonline.org/bissell_crosswave_pet_pro_replacement_parts.pdfIn PDF document text
    • http://zuzorovix.scienceontheweb.net/63402846977.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466370/normal_603908c681d22.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420610/normal_5fced3edda3ed.pdfIn PDF document text
    • http://tegokujili.iblogger.org/free_8x10_shed_plans.pdfIn PDF document text
    • http://miwodenexiz.iblogger.org/zomunoxeteduluxuf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389801/normal_5ff1688a343cc.pdfIn PDF document text
    • http://faporivifavavep.22web.org/caveman_diet_plan.pdfIn PDF document text
    • http://nurimipo.22web.org/ludekijibadafifazol.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bizedesaxifu.onlinewebshop.net/56236764643.pdfIn PDF document text
    • http://dawikoduwegoka.rf.gd/why_is_my_washing_machine_not_spinning_my_clothes_dry.pdfIn PDF document text
    • http://mifojizu.myartsonline.com/4985423602.pdfIn PDF document text
    • http://zonafikepejese.onlinewebshop.net/56160849430.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/031bee6e-77fd-4166-8f4b-2405eaaf660b/excel_for_dummies_books_free_download.pdfIn PDF document text
    • http://tifuximixadove.rf.gd/aconsejamiento_pastoral_bernardo_stamateas_gratis.pdfIn PDF document text
    • http://javuxanasojajex.epizy.com/militusususiduxunub.pdfIn PDF document text
    • http://vunonam.atwebpages.com/is_kentucky_drivers_license_valid_for_air_travel.pdfIn PDF document text
    • http://vudagolefedofa.epizy.com/charlie_chaplin_2_songs_hdvd9.pdfIn PDF document text
    • http://lomaxunofixise.rf.gd/17838655061.pdfIn PDF document text
    • http://jiviwuruxaboku.epizy.com/migenami.pdfIn PDF document text
    • http://nibemodida.myartsonline.com/duchess_of_malfi_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8964038-2dd6-46dc-a84a-f1bb44442050/53871174821.pdfIn PDF document text
    • http://zewadomi.myartsonline.com/4045354772.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_off00012397.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12397 5176 bytes
SHA-256: db9df28f1f5f6c69c3e6d309e49ffa0b511fa7f8c6c6ac425fc647173ae51c6c
font_01_sfnt_off0001352b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1352B 12052 bytes
SHA-256: c7740e8f778e53a10eb9785f12c3b14d2ccd1212d6897202fa4f84f451412cfb

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