Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a867749bd4e50bb…

MALICIOUS

PDF

77.7 KB Created: 2021-03-26 18:07:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 9c748052531634030a20e2588f82d15e SHA-1: 09cc9c627e9ec54b601d30217c7a31ab8d0a24d3 SHA-256: 1a867749bd4e50bb579627fbb88f86e2fee2972fc1bf01926b21d0221d6af199
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 and acting as a link farm, which is a common tactic for phishing or distributing further malware. The presence of external URIs and the ML classification strongly suggest a malicious intent to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xajibur.ru/123?utm_term=chaotic+card+game PDF link annotation
    • http://sudilufib.getenjoyment.net/nupoper.pdfIn PDF document text
    • http://zezitil.22web.org/vb.net_basic_interview_questions_and_answers_for_freshers.pdfIn PDF document text
    • http://pexulisinipev.sportsontheweb.net/catalogue_oriflame_2020.pdfIn PDF document text
    • http://fuxisileza.mywebcommunity.org/pampered_chef_apple_salsa_recipe.pdfIn PDF document text
    • http://omerkatanalp.com/15127168957zok4k.pdfIn PDF document text
    • http://kobivoweder.mypressonline.com/integral_of_cos_x_sqrt1sin2x_from_0_to_pi_2.pdfIn PDF document text
    • http://jusukigib.sportsontheweb.net/how_many_calories_in_a_large_dunkin_donuts_black_coffee.pdfIn PDF document text
    • http://discount50it.pro/685402049937r6fo.pdfIn PDF document text
    • http://peluxuba.sportsontheweb.net/12464006591.pdfIn PDF document text
    • http://rijigikesezaga.mypressonline.com/mysore_building_bye_laws.pdfIn PDF document text
    • http://digitaltoolsfor.xyz/dream_hospital_health_care_manager_simulator_mod_apk5ovav.pdfIn PDF document text
    • http://lejunuzegakikuv.mypressonline.com/ravoti.pdfIn PDF document text
    • http://zonetufe.iblogger.org/kenmore_quiet_comfort_humidifier_model_17006.pdfIn PDF document text
    • http://jolovomolosubi.getenjoyment.net/biotecnologia_industrial_volume_1_download.pdfIn PDF document text
    • http://yachts-4-sale.com/nejupaparakanovifijesdi1lc.pdfIn PDF document text
    • http://redita.fun/3540338228bl332.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kemiwadosu.rf.gd/best_anti_theft_bike_lock.pdfIn PDF document text
    • http://lememisuxelivem.rf.gd/83104129934.pdfIn PDF document text
    • http://lefivox.epizy.com/sewozigugisazi.pdfIn PDF document text
    • http://vagoposejexuma.epizy.com/jacoco_report_not_found_maven.pdfIn PDF document text
    • http://zenakezogutomu.onlinewebshop.net/aha_take_on_me_piano.pdfIn PDF document text
    • http://xulezudo.epizy.com/flvs_drivers_ed_test_5_answers.pdfIn PDF document text
    • http://jixuvazorired.epizy.com/jenuxodunigomosisijewaw.pdfIn PDF document text
    • http://lelikerakovet.atwebpages.com/31008182831.pdfIn PDF document text
    • http://posikin.myartsonline.com/bristol_city_fixtures_2020_19.pdfIn PDF document text
    • http://fifomivosa.rf.gd/btech_malayalam_movie_songs_320kbps.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_off0000f1de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1DE 5048 bytes
SHA-256: a4c2ee91da814953292c6d1f51b031346e941354e20c05623f9edfe03820d0c6
font_01_sfnt_off000102d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D9 10752 bytes
SHA-256: a092f2cd7abdb9f7bdbf4f58b79c091339d1962764476353b64675070dbfda75

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