Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f55701207c3ff47…

MALICIOUS

PDF

76.7 KB Created: 2021-03-14 05:04:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2b6750617aaa9402b8d242ad982a6d55 SHA-1: c12522dd7e882ebfd54f8f5b108380365951d87e SHA-256: 7f55701207c3ff47655a256905307d0bf3822e20806384334cbf612f933758bd
66 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs suggests an attempt to lead users away from the document. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution lures.

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://soxebez.ru/123?utm_term=orthoinfo+knee+arthroscopy+exercise+guide
    • http://bbcua.site/pibikuwatocrqfj.pdf
    • http://gouliwer.online/1048833330735g5a.pdf
    • http://vumavotanumibuv.iblogger.org/jio_store_app_apkpure.pdf
    • http://neditaxuvim.getenjoyment.net/lerobikumudinilam.pdf
    • http://uose.xyz/beautiful_song_by_bukunmi_oluwashina120ic.pdf
    • http://jalatuxu.iblogger.org/ansys_full_form.pdf
    • http://vixemifojetinag.sportsontheweb.net/harry_potter_and_the_goblet_of_fire_full_movie_youtube.pdf
    • http://mozefiri.22web.org/vesazepizovudap.pdf
    • http://hairsprof.ru/ge_universal_remote_cl3_auto_code_search12lnp.pdf
    • http://thelait.pro/621106459924v5bq.pdf
    • http://idealica-italiauficiale.website/bachelor_thesis_thema_formulierenbh2ur.pdf
    • http://phtech.site/40605914328eq65u.pdf
    • http://drenajkrasnodar.ru/functional_training_workout_planr58cx.pdf
    • http://zutatowatipo.mywebcommunity.org/tm_meditation_technique_free.pdf
    • http://smilex.club/suximupenelemamuj4u7tc.pdf
    • http://nazhivy.net/24878527386ml8zu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wiloradakuno.onlinewebshop.net/logepagirutukuladexotenir.pdf
    • http://relizaki.epizy.com/steinberg_cubase_5_full_crack.pdf
    • http://bopevevene.epizy.com/xazages.pdf
    • http://funazowo.rf.gd/access_master_garage_door_opener_battery_type.pdf
    • http://zosonigileg.rf.gd/how_to_make_a_rocket_stove_with_cinder_blocks.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efd7.bin
e362890c3625080e30d4c63ed8d3486ff3dd0bc0476e2b5686d0b3ba8a5d3c94		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD7 5648 bytes
font_01_sfnt_off00010319.bin
c5e2fe0bbd1ff8fbc8a3f78631aba76b4fb8ef79cb9f77c67c01d4a21d407afa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10319 10036 bytes

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