Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef30b5fa95f7ca75…

MALICIOUS

PDF

74.7 KB Created: 2021-01-18 22:20:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 1f0e8fa2ed7957a57fc5b29c965dedef SHA-1: 94174c8bc63d3ee84e36084e8e2bcb010368e3e0 SHA-256: ef30b5fa95f7ca75ca95043f172df98ad1c321c437a9e177a599f525b9ff804d
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting or link farms, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a spearphishing attachment designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/123?utm_term=burke+definition+of+man+summary PDF link annotation
    • https://vifaseberafu.weebly.com/uploads/1/3/0/9/130969816/6419191.pdfIn PDF document text
    • http://ropufogesuzazeg.iblogger.org/angel_of_death_full_movie.pdfIn PDF document text
    • https://pugiputofal.weebly.com/uploads/1/3/4/7/134740318/nudugi.pdfIn PDF document text
    • http://dutusejutax.22web.org/minecraft_mountain_village_map.pdfIn PDF document text
    • https://piwututa.weebly.com/uploads/1/3/4/6/134625425/5908627.pdfIn PDF document text
    • http://toteganutiv.66ghz.com/55933462653.pdfIn PDF document text
    • https://site-1180442.mozfiles.com/files/1180442/pikiso.pdfIn PDF document text
    • https://fabidarupevonu.weebly.com/uploads/1/3/4/6/134620419/piwopipubajon.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/zoromexemuzid/zihale_masti_mukund_ranjish_song_320kbps.pdfIn PDF document text
    • http://nawonuzegajosi.epizy.com/21083243848.pdfIn PDF document text
    • http://bawatusarab.epizy.com/sindrome_de_cansancio_cronico.pdfIn PDF document text
    • http://jilovin.epizy.com/valiv.pdfIn PDF document text
    • http://naremijex.epizy.com/pacman_classic_pc.pdfIn PDF document text
    • http://badivisixeg.epizy.com/kaththi_theme_bgm.pdfIn PDF document text
    • https://s3.amazonaws.com/libowebujakux/ruvogoganevunavubileja.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/nogutenagovob.pdfIn PDF document text
    • https://s3.amazonaws.com/nafoxuda/sultan_movie_song_bulleya_ringtone.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_off0000e708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE708 5236 bytes
SHA-256: 0f3598c2845a2592f0791b69457eb1295cf714981339632e2464bc6783a2f55f
font_01_sfnt_off0000f8cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8CC 10756 bytes
SHA-256: 363ea00a181237029ce6d43d639029fc72f8019a98720fc9599bab40f0f89d8b

Open this report in the interactive analyzer, or submit your own file for analysis.