Malicious PDF — malware analysis report

Static analysis result for SHA-256 021513fdfeba183b…

MALICIOUS

PDF

86.2 KB Created: 2021-03-28 16:59:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 03eca88e60066321cc73a21cec5af68c SHA-1: 67e8478c653600396f7171f559d1a79fc8c946bf SHA-256: 021513fdfeba183b1e3c156f8aad0021675f0ab8a0bfe6e923f841677f1b54c3
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 phishing content. The document body, though heavily obfuscated, appears to be a lure related to search terms, directing users to external sites. The presence of multiple external URIs and link farm heuristics indicates a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://botokaw.ru/award?keyword=the+adventures+of+tom+sawyer+online+pdf PDF link annotation
    • https://cdn.sqhk.co/vofepubot/heieii3/60304426314.pdfIn PDF document text
    • https://cdn.sqhk.co/wapuwozelob/dhbQt4e/fogugipewapuzolumafoj.pdfIn PDF document text
    • https://cdn.sqhk.co/zizenozi/0gfijcL/extreme_landings_mod_apk_3._7._0.pdfIn PDF document text
    • http://nebolitazezo.iblogger.org/what_if_netflix_show_review.pdfIn PDF document text
    • http://vapabamulu.22web.org/ti_84_plus_ce_flash_applications.pdfIn PDF document text
    • https://cdn.sqhk.co/texirova/gGBYhhJ/zombie_alley_idle_shooter_zombie_killing_games.pdfIn PDF document text
    • http://woodbonus.net/tosogunosipalisefatfcsyw.pdfIn PDF document text
    • https://cdn.sqhk.co/zizenozi/lNgdXNV/1000_oldies_live_stream.pdfIn PDF document text
    • http://huseyincanx.com/833593185088dj9c.pdfIn PDF document text
    • http://lotsmen.com/master_cleanse_recipe_one_day64yu7.pdfIn PDF document text
    • http://delaem-sami.online/lady_popular_fashion_arena_cheatsc7j2m.pdfIn PDF document text
    • https://cdn.sqhk.co/kekotenonaxu/FVgj2hj/piggy_boom_hack_download.pdfIn PDF document text
    • http://usmileofficial.site/61297563031d9ko.pdfIn PDF document text
    • https://cdn.sqhk.co/vakenuda/isgh1fM/rc_car_race_track_layouts.pdfIn PDF document text
    • http://akvatehnika74.ru/46727843241h2mxb.pdfIn PDF document text
    • http://zelopaqq.xyz/how_much_is_a_2020_maserati_suvc7hk4.pdfIn PDF document text
    • http://ukrinsure.com/92994863517uzep4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tupemovon.rf.gd/paselonodosodedam.pdfIn PDF document text
    • http://jojudodadanu.epizy.com/34931625900.pdfIn PDF document text
    • http://buxazub.epizy.com/wamazinufavewozubo.pdfIn PDF document text
    • http://temekem.epizy.com/n_t_r_old_songs.pdfIn PDF document text
    • http://bananamiw.rf.gd/27252650129.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f980.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF980 5484 bytes
SHA-256: 4d11d8ef664616f6f78c3b34f96ca110bf9cc76336460a9363e2f88b60415a52
font_01_sfnt_off00010c19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C19 11384 bytes
SHA-256: 80eab2248262271e1dca3611e6c29877a14c914da3bf6324ca5089f1f65c53c2
font_02_sfnt_off00013360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13360 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e

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