Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccc595681d2b5e05…

MALICIOUS

PDF

100.5 KB Created: 2021-02-27 22:19:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: ef88032860b35ab8867ac360c33c5682 SHA-1: 59a7dafe2be3d340a41ca1715ae76bdde100eb31 SHA-256: ccc595681d2b5e05ee1c11e71580499fa7945aebe9484cbb1a2c7667900ff015
66 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 link farms, indicating a phishing or content-luring scheme. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs suggests an attempt to redirect the user to a malicious site. No scripts were extracted, but the overall structure and URL distribution are consistent with a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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://xezojetit.ru/wb?keyword=linksys%20ac1200+%20setup PDF link annotation
    • https://cdn.sqhk.co/lewatesudo/iat8Wib/89667391386.pdfIn PDF document text
    • https://cdn.sqhk.co/vefemenivu/hzhbVvE/netflix_series_ratched_filming_locations.pdfIn PDF document text
    • http://jarewitof.mypressonline.com/iq_test_questions_with_answers_in_urdu_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzetuzame/bbjcIjg/geometry_dash_neon_subzero_apk.pdfIn PDF document text
    • http://momsmall.space/free_music_maker_softwaresvryca.pdfIn PDF document text
    • https://cdn.sqhk.co/goluxewimabu/fhbgdIf/xepadisapesagulapeviboba.pdfIn PDF document text
    • https://cdn.sqhk.co/fomiroza/2mE4giC/detention_pond_design_example.pdfIn PDF document text
    • https://cdn.sqhk.co/pizililiv/ngjigdd/fuse_voltage_drop_chart.pdfIn PDF document text
    • https://cdn.sqhk.co/xeloxilava/MUTHiga/download_game_pac_man_fever_ps2.pdfIn PDF document text
    • https://cdn.sqhk.co/gefimiwotux/Qjbhfjf/7008344254.pdfIn PDF document text
    • http://yachts-4-sale.com/81424311366cyqkw.pdfIn PDF document text
    • https://cdn.sqhk.co/lomasamube/hd0jiid/watch_movies_and_tv_shows_online_free_unblocked.pdfIn PDF document text
    • https://cdn.sqhk.co/vebiziwob/jXjdAhg/11064653567.pdfIn PDF document text
    • https://cdn.sqhk.co/wekaradukuve/aHmsJje/foxeguvokipofi.pdfIn PDF document text
    • https://cdn.sqhk.co/modonasuje/Agh7Zjc/pixels_app_download.pdfIn PDF document text
    • http://lamakexo.scienceontheweb.net/80112936270.pdfIn PDF document text
    • http://hookup757.fun/45445033734pu3tn.pdfIn PDF document text
    • http://fofiwafajelerax.sportsontheweb.net/romeo_and_juliet_law_in_texas_2020.pdfIn PDF document text
    • http://nubenukarerira.22web.org/jorutufibitogomugamutapol.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvavegipap/rBWibie/hakuouki_season_2_episode_7_english_dub.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xaxabegil.epizy.com/fitbit_flex_4_sale.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_off00014c65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C65 5232 bytes
SHA-256: 3405744a6f16cd3bdda3dc8646821087e40d4ea721cd5857bb05766ef0179b18
font_01_sfnt_off00015e5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E5D 11228 bytes
SHA-256: eea7a4522efe24d0dda2977fac7f2b5b7dc7ddd75440bbc6d5589a336709dbac

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