Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5128ed48b3c576b…

MALICIOUS

PDF

79.6 KB Created: 2021-04-02 05:45:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: a298e08c607a03fb8f548a7f9933d5cd SHA-1: 1b713acf91db7925cc1a7d995653c907bfdeb23d SHA-256: e5128ed48b3c576bfacbbc43a4ac39a68850fcfac395ec09ce78271c8c73f5da
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, with a primary suspicious URL being https://gimoguvi.ru/strik. The document body, though heavily obfuscated, suggests a lure related to a movie title, which is a common tactic for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://gimoguvi.ru/strik?utm_term=from+the+mixed+up+files+of+mrs+basil+movie PDF link annotation
    • http://ig-about.net/sizibaxolo0nx4y.pdfIn PDF document text
    • http://gaydating.world/bissell_cleanview_helix_vacuum_filterynsj3.pdfIn PDF document text
    • http://yoganchik.space/how_to_calculate_poisson_distribution_on_ti-84_plusj8ijw.pdfIn PDF document text
    • http://tk-pobeda.site/lavuvinekagelurz03.pdfIn PDF document text
    • http://fixmarker.fun/11747140145fik.pdfIn PDF document text
    • http://daddytestit.xyz/alora_orientation_and_answer1ealb.pdfIn PDF document text
    • http://1-bog.ru/pajobuwudasoveguqy4.pdfIn PDF document text
    • http://mon-fortuneo.best/53868149467i1gzi.pdfIn PDF document text
    • http://azorocheat5.xyz/what_are_the_attitudes_and_values_of_a_student_nurseu8n8o.pdfIn PDF document text
    • http://rubka.space/download_emulator_genplusdroidb5us0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1463605-3a22-49c9-97f9-65d270e0977f/rujeleger.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/103e69f0-59fd-4553-9b3d-e81381f57f53/guxotag.pdfIn PDF document text
    • http://doxokalisawe.myartsonline.com/gestalt_perception.pdfIn PDF document text
    • http://vimixof.onlinewebshop.net/who_is_the_poorest_rich_person_in_the_world.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9701bda3-ca8b-4e11-80f2-6880a6f6a6f4/the_missing_season_2_recap_episode_5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6edd7ad5-b5ae-4afd-b00f-c9ec6c7003db/how_to_fix_canon_ip2770_black_ink.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66b9525d-432f-4b00-91c1-a6739a1294af/principles_dalio_goodreads.pdfIn PDF document text
    • http://rurebafib.onlinewebshop.net/l_afficheur_lcd.pdfIn PDF document text
    • http://juwukopegonamu.onlinewebshop.net/zojilida.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59d30211-797f-46c0-8d77-195d5b4c6db5/segometebulojesab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3fad4db-7443-4934-9530-4313d4e28f21/kesatupapowodela.pdfIn PDF document text
    • http://belibivizonojo.myartsonline.com/farapelosinevuzojozupez.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_off0000f9eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9EB 5504 bytes
SHA-256: e8da67f12dcc8769d07e50e49b0fcc0efe829182cdb720bdbbe76feddcc295c2
font_01_sfnt_off00010c7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C7D 10632 bytes
SHA-256: ebd2f2d886393d794d06f8eef9a90b034a8398771b006a17448aa338149ba2e1

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