Malicious PDF — malware analysis report

Static analysis result for SHA-256 32e7fd8bd316a447…

MALICIOUS

PDF

74.7 KB Created: 2021-04-02 01:18:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: ed1060c59aed5cda692b8c43a2660555 SHA-1: 20c0ecfe6e766659444a973aea308b0587b4c625 SHA-256: 32e7fd8bd316a447212d9a3c2a5b21629020db4f8ea8b060b4958201d90dd6ae
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to disposable domains and is flagged as a link farm, suggesting it's designed to redirect users to potentially harmful sites. The presence of external URIs and the link farm heuristic strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=autoexec.+cfg+tf2 PDF link annotation
    • http://instapresent.site/lifubalifulomemujowe5hhwo.pdfIn PDF document text
    • http://fuvafutiku.22web.org/balajefi.pdfIn PDF document text
    • http://lifizix.22web.org/bichoo_hd_video_song.pdfIn PDF document text
    • http://carishr.com/how_do_you_replace_a_water_heater_elementp7u1e.pdfIn PDF document text
    • https://cdn.sqhk.co/rarukaboz/ihhieM5/segizipulawonozor.pdfIn PDF document text
    • http://gufutaca3.xyz/dofalikuvid3z8ys.pdfIn PDF document text
    • https://cdn.sqhk.co/rijomawonuj/vjgLRid/black_christmas_2006_trailer_ita.pdfIn PDF document text
    • http://obsluzhivanie-kompyuterov.moscow/tofajekifigofameji23pxm.pdfIn PDF document text
    • http://vereffka.xyz/18612960466nkwjk.pdfIn PDF document text
    • https://cdn.sqhk.co/mukibusu/jYcijji/wikiletopafudubi.pdfIn PDF document text
    • https://cdn.sqhk.co/padasagam/hihb5gc/phoenix_sunset_pictures.pdfIn PDF document text
    • http://jobs-ingenieur.best/what_can_you_cook_in_a_black_and_decker_toaster_oven0oeby.pdfIn PDF document text
    • http://jushq.pro/hayward_swimclear_cartridge_filter_manualjudqn.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xomepixo/80107344286.pdfIn PDF document text
    • https://s3.amazonaws.com/daniwodug/righteous_bold_font.pdfIn PDF document text
    • http://noxokabebixe.epizy.com/saeco_vienna_plus_manual_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/benuka/resident_evil_4_hack_apk_android.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/rubagamiwozasalubide.pdfIn PDF document text
    • http://vumesurev.epizy.com/selenium_chrome_python.pdfIn PDF document text
    • http://guxajez.rf.gd/katetolik.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_off0000e8cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8CF 4756 bytes
SHA-256: c2435c768cfe4776699965b3090c25570ef13db596fd4160e62e3177b6838712
font_01_sfnt_off0000f931.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF931 10860 bytes
SHA-256: 92e5f7dc5342782061d54676026c010502d3518a2fb820f03131c158a665981c

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