Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2a4916d95f3704a…

MALICIOUS

PDF

73.4 KB Created: 2021-02-20 10:42:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 90ed5c94d39198d9e462be8d3c8c0335 SHA-1: 278057a7a5ac5330074a4358f35bad21a29b0dd8 SHA-256: c2a4916d95f3704a2f3f736842232f26d857dc73eabd188040c20d92673fd35b
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, a common tactic for phishing or distributing further malware. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic specifically flags this behavior, indicating a high likelihood of malicious intent. While no scripts were directly extracted, the structure and URL patterns strongly suggest a malicious document designed to redirect users to harmful 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://jottigo.ru/123?utm_term=functional+training+workout+at+home PDF link annotation
    • http://help-lnstagram-verifycopyrgiht.com/pirate_king_game_free_spins9xfby.pdfIn PDF document text
    • http://rixiroremijiw.22web.org/6637715419.pdfIn PDF document text
    • http://hookup154.fun/kingsman_the_secret_service_download_in_teluguhx3af.pdfIn PDF document text
    • http://klosheff.xyz/3773312074194al2.pdfIn PDF document text
    • http://businesshelpservice.com/wot_lorraine_40t_guidewj963.pdfIn PDF document text
    • http://creamwalls.space/buccal_home_of_your_bucket_list_foundation4e823.pdfIn PDF document text
    • http://pidanukiziteko.22web.org/anton_chekhov_complete_short_stories.pdfIn PDF document text
    • http://masajsalonunuz.com/fixikepetazowizafodaytgm6.pdfIn PDF document text
    • http://tortomsk.ru/76099754484xdj4x.pdfIn PDF document text
    • http://xubozogafajus.22web.org/maytag_gemini_double_oven_installation_manual.pdfIn PDF document text
    • http://vorgazme.com/rireg7745z.pdfIn PDF document text
    • http://creditinquiry.info/426935239634ywoy.pdfIn PDF document text
    • http://olymptrade.buzz/3442372774168m99.pdfIn PDF document text
    • http://hdvideo.design/simulator_for_brawl_stars_mod_apk_unlimited_moneybhwml.pdfIn PDF document text
    • http://becloud.website/66900645554x82gy.pdfIn PDF document text
    • http://pochta-24.cc/bajowezowomexnhjpf.pdfIn PDF document text
    • http://idealslimitaly-ufficiale.site/82419797803co45t.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://noporotosodapo.epizy.com/moligilisaseje.pdfIn PDF document text
    • http://nivawuxiki.rf.gd/negoditupiwud.pdfIn PDF document text
    • http://dobifagamuwu.rf.gd/60819266158.pdfIn PDF document text
    • http://zunuwovadete.epizy.com/android_support_modern_authentication.pdfIn PDF document text
    • http://rojomiv.rf.gd/level_e_unit_6_synonyms_antonyms_answers.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_off0000e38e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE38E 5144 bytes
SHA-256: 5b49eee4cfe06c9d78445db85f11f863001aac601d8f36922db7c1decc36b1a8
font_01_sfnt_off0000f4fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4FD 10292 bytes
SHA-256: 48497dcfe475ab6e3f8f8e0dfb8216406c01418b9199bc84d9f0a93dc2d1fbf3

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