Malicious PDF — malware analysis report

Static analysis result for SHA-256 147fd7ebc1073faf…

MALICIOUS

PDF

66.6 KB Created: 2021-05-08 14:27:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f89b6b81076747684e01c65eaf6b87c SHA-1: 2c4804a8199e15b3897d1ee7c874250a50d1fb12 SHA-256: 147fd7ebc1073faf86c707ccf735b3b3a4eb8c484e1589b049d2bdb3457ee0b6
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, many hosted on disposable domains, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and heuristic firings point towards the exploitation of PDF vulnerabilities or social engineering to drive traffic to these external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://botokaw.ru/strik?utm_term=shiv+prasad+koirala+books
    • http://strita.space/dagozzib24.pdf
    • http://antileqphh.site/91841328323n6yrw.pdf
    • http://icub.tech/kuvofibiniko60fpz.pdf
    • http://my-favshop.online/39376594990d3w7n.pdf
    • http://it50discount.pro/brexit_agreement_full_textv3pfy.pdf
    • http://es50off.pro/gedagipodigowigarotuuiojn.pdf
    • http://clubstore.info/password_safe_android_reviewd7snh.pdf
    • https://cdn.sqhk.co/xujurovemu/p4kidgd/99611575596.pdf
    • http://useraisins.pro/kopolusisotebu1l4ym.pdf
    • https://cdn.sqhk.co/vagewovupug/vHjdxh5/96799084532.pdf
    • http://clyb-wylcan3.space/dna_magazinex56em.pdf
    • http://dsv-trening.ru/american_spirit_color_meaning8uqex.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/sesafefanulokam/mechanics_of_machines_cleghorn_solutions.pdf
    • https://s3.amazonaws.com/gixirojozogufux/38703158396.pdf
    • https://s3.amazonaws.com/sasufufa/resatanitotifazam.pdf
    • https://uploads.strikinglycdn.com/files/2e9bbef3-7fef-48e8-88de-40af59385bab/trx_workout_at_home_for_beginners.pdf
    • https://s3.amazonaws.com/rutufokedizon/which_is_better_big_data_or_machine_learning.pdf
    • https://uploads.strikinglycdn.com/files/d41272fb-9261-4e6c-9375-2937307cc7a2/oracle_11g_sql_plus_default_username_and_password.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_off0000c533.bin
3d935a453c0dd4e59e3a28ada1e4a87d52f82f7d5181b35200b66282db885f9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC533 5416 bytes
font_01_sfnt_off0000d791.bin
ca160b688894b555aa7fe4848fc8dcbdaf5cebfb0dca66c87dc050cb87b8963b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD791 11104 bytes

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