Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdd7ba409155a584…

MALICIOUS

PDF

76.1 KB Created: 2021-02-27 00:28:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 6db91a82e30ee28f6cf89fde06305292 SHA-1: 5ee2f3e8ee7723bfbe7386474f0f1e61d13316de SHA-256: fdd7ba409155a584b7fc018c61a7a62885efd18464605c44daa360f65f259350
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a non-clustered link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains fragments related to common search queries, likely used as lures to direct users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://resalured.ru/123?utm_term=can+i+drop+off+fedex+package+at+ups+store PDF link annotation
    • http://lazategomid.scienceontheweb.net/what_is_reading_grade_level_equivalent.pdfIn PDF document text
    • http://rexonina.medianewsonline.com/98876097180.pdfIn PDF document text
    • http://1offpark.xyz/33620060965g2kjf.pdfIn PDF document text
    • https://cdn.sqhk.co/wejewenu/ffosjh0/kegewojabakowifuxusi.pdfIn PDF document text
    • http://nozijepirag.22web.org/wuvegobuxarevitotag.pdfIn PDF document text
    • http://pulezuxelad.22web.org/ipcc_special_report_ocean_and_cryosphere.pdfIn PDF document text
    • http://wow50.pro/kedisodaligafakegkegl.pdfIn PDF document text
    • http://creditreportusa.info/tutevuxagobudegigegiwx8n0.pdfIn PDF document text
    • https://xaxepilote.weebly.com/uploads/1/3/4/2/134265473/53e7f621.pdfIn PDF document text
    • http://bit7.top/new_odia_movie_song_freeryu4s.pdfIn PDF document text
    • http://mobufuwiwid.medianewsonline.com/what_is_the_average_income_of_a_household.pdfIn PDF document text
    • http://jobesagaponapa.22web.org/banshee_season_2_episode_5_subtitles.pdfIn PDF document text
    • https://cdn.sqhk.co/pubodegosog/iCjgdjc/map_marker_online.pdfIn PDF document text
    • https://cdn.sqhk.co/gilevetu/3lfgcjc/thrifty_definition_economics.pdfIn PDF document text
    • https://baputopozim.weebly.com/uploads/1/3/5/3/135336161/f45f87e.pdfIn PDF document text
    • http://raicen.com/variable_costing_unit_product_cost_calculatorx65fw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jutodit.epizy.com/mosesenad.pdfIn PDF document text
    • http://fofifalog.rf.gd/musexe.pdfIn PDF document text
    • http://lawaxisagiwog.atwebpages.com/39655440737.pdfIn PDF document text
    • http://loluwoje.epizy.com/8424892929.pdfIn PDF document text
    • http://xarigezosuwa.rf.gd/canyons_resort_ski_report.pdfIn PDF document text
    • http://gigapexolazet.rf.gd/excel_vba_format_now_date_and_time.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_off0000ebbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBBC 5328 bytes
SHA-256: 7a0ae3e34f2153ff63fe8e032ea8af56c9810e71df3dcc6175296387019ed863
font_01_sfnt_off0000fdf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF3 10820 bytes
SHA-256: 4b33499ec15e088a4ff11b831c81f8656a9c80929d19e216fc074b407456076e

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