Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d133cf1bc89d64f…

MALICIOUS

PDF

83.2 KB Created: 2021-03-28 21:22:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: d01dd3bcf67c15d9a66a4a40a4e850f4 SHA-1: 22e375b1a89462f485467f9547a9ea06d5adce28 SHA-256: 0d133cf1bc89d64fb147d66598304b3d216bbb134f4d8490de7b5c1998ec7e92
126 Risk Score

Malware Insights

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

The PDF file contains numerous external URIs and is flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to a legal case summary. The presence of many distinct hosts and disposable hosting indicates a link farm designed to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jumiwimov.ru/wix?keyword=hansberry+v.+lee+summary PDF link annotation
    • https://cdn.sqhk.co/naziwixolagu/icPbkij/bally_star_trek_pinball_backglass.pdfIn PDF document text
    • https://xosulokut.weebly.com/uploads/1/3/4/4/134466674/dofotuvodujigubo.pdfIn PDF document text
    • https://cdn.sqhk.co/somisafeg/hc0hbjf/murder_in_the_alps_chapter_3_collectibles_locations.pdfIn PDF document text
    • http://tibijosetinaj.getenjoyment.net/88267038105.pdfIn PDF document text
    • http://fofunido.iblogger.org/reduce_size_acrobat_pro.pdfIn PDF document text
    • https://cdn.sqhk.co/lomokubaf/geha3QP/playing_card_game_apps_for_android.pdfIn PDF document text
    • http://jubigale.scienceontheweb.net/100uf_63v_electrolytic_capacitor_datasheet.pdfIn PDF document text
    • https://zipatusuf.weebly.com/uploads/1/3/4/0/134012633/06d973168396.pdfIn PDF document text
    • http://meleworofazob.22web.org/turkish_march_sheet_piano.pdfIn PDF document text
    • http://vevapefin.sportsontheweb.net/how_to_get_jobs_as_a_freelance_graphic_designer.pdfIn PDF document text
    • http://luvozoredola.iblogger.org/57451112064.pdfIn PDF document text
    • https://cdn.sqhk.co/devisofage/ichhq96/download_footrock_2_mod_apk_android_1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tarobajasupimi.epizy.com/vetewoledabikorikav.pdfIn PDF document text
    • http://faxiruvud.myartsonline.com/what_oil_do_you_put_in_a_honda_generator.pdfIn PDF document text
    • http://ginowane.onlinewebshop.net/81533310511.pdfIn PDF document text
    • http://rezugarufubibif.rf.gd/electronics_and_communication_engineering_books_for_1st_year.pdfIn PDF document text
    • http://zosejanukapub.rf.gd/8933402028.pdfIn PDF document text
    • http://fexojuvaf.rf.gd/google_docs_forms_templates.pdfIn PDF document text
    • http://sosozodazu.epizy.com/15th_century_hairstyles.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_off00010995.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10995 5124 bytes
SHA-256: fab1a5de9ee555e2d5d5adb6969683fdb5e43a50ecae524d486d4b206a95089e
font_01_sfnt_off00011af7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AF7 10432 bytes
SHA-256: f6b80cef014132e7d2ef132086c5d6c86260dab6cd9b6165b6cc6794ae2c6f9e

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