Malicious PDF — malware analysis report

Static analysis result for SHA-256 00f95ba134993c0e…

MALICIOUS

PDF

82.2 KB Created: 2021-03-18 12:59:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 4808a1d49be7ae5697b1d28ab83fec11 SHA-1: fbcc5023b1c4c747769a27b0561e0b1f818ea067 SHA-256: 00f95ba134993c0eaeb8a4a7da389c14a1674771550b6d808a9866c6f52178f8
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with one prominent URL pointing to 'resalured.ru' and disguised with a search query for song lyrics. Heuristics indicate this PDF is a link farm on disposable hosting, and ClamAV detected it as 'Pdf.Phishing.Trojan'. The ML classifier also flagged it with high confidence. While no scripts were explicitly extracted, the structure and URL usage strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://resalured.ru/123?utm_term=bbuddah+hoga+terra+baap+songs+free PDF link annotation
    • http://center-about.com/what_diet_are_humans_meant_to_eathh9ek.pdfIn PDF document text
    • http://policyhelpcenter.com/fender_hot_rod_deluxe_112_enclosure_limited_edition_redvmher.pdfIn PDF document text
    • http://covid-19online.site/282332102697185p.pdfIn PDF document text
    • https://cdn.sqhk.co/girolivudafo/chigEhj/zombie_riot_css.pdfIn PDF document text
    • http://soldonlakewood.com/pulafitidupefthxo3.pdfIn PDF document text
    • http://jazonezamivoka.22web.org/how_to_cook_bolete_mushroom_recipe.pdfIn PDF document text
    • http://dasoxugodomige.22web.org/fluke_87_multimeter_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/wukatigubo/jigjegg/81795405375.pdfIn PDF document text
    • https://cdn.sqhk.co/rifojimuna/fiahije/bigfoot_app_ios.pdfIn PDF document text
    • http://zazonowipudu.66ghz.com/pimp_iceberg_slim_movie.pdfIn PDF document text
    • https://cdn.sqhk.co/vefemenivu/gnAiiUo/car_driving_bike_driving_simulator_extreme_car.pdfIn PDF document text
    • http://cmbespaceclient.xyz/xorevakonewetukonukugagoro5.pdfIn PDF document text
    • http://axecheat6.xyz/xujigaxei6wdm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rakawuzigubu.rf.gd/fema_is_100_c_answers_quizlet.pdfIn PDF document text
    • https://63995da9-74be-4895-8497-a4fa53c9845d.filesusr.com/ugd/788c84_e6cafe771d9745f1867f67019a260378.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xirixepo/formato_libri_kindle_paperwhite.pdfIn PDF document text
    • https://s3.amazonaws.com/guxosa/math_worksheets_grade_4_adding_fractions.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezodepugov/jufutokugupezewosukekos.pdfIn PDF document text
    • https://a9f3490c-def6-45ea-9957-aefa341d54bd.filesusr.com/ugd/84b587_db728115a58946bfbd28a0b81c92f142.pdf?index=trueIn PDF document text
    • http://lafanibawonol.rf.gd/30839561200.pdfIn PDF document text
    • https://82656f1f-dd0f-4426-89ca-c5688288f975.filesusr.com/ugd/56de54_5b6be6b542134151a6d682927a492ff1.pdf?index=trueIn 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_off00010176.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10176 5460 bytes
SHA-256: 1c0cb8216825ef0db05dc3c4e3e596c0ac12e8cf38e32e95982db6e58bb056be
font_01_sfnt_off000113fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113FD 11160 bytes
SHA-256: 94966253fe92c8b950336359f4de67c81ded000e40eb850b30187257746d5ed1

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