Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2b4a4b71c71a81e…

MALICIOUS

PDF

80.6 KB Created: 2021-03-21 04:27:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 7ad478e963695a1bda057c711bfa30df SHA-1: de6795eaea9f0b7a679725c8e3ff597a6487dbd6 SHA-256: d2b4a4b71c71a81e7da7a5a0c874b0932a20ce7638b4630eaf4478857f359d0c
126 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many hosted on disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, appears to be a lure related to a common search query, directing users to a suspicious URL. This suggests 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://vilenefex.ru/strik?utm_term=cuanto+equivale+un+metro+cubico+de+agua PDF link annotation
    • https://cdn.sqhk.co/rurufimibiwe/fgeWgd2/fewuronujitezotilebuzo.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/CtgeAkE/xujugu.pdfIn PDF document text
    • http://sujabupinoda.scienceontheweb.net/caracteristicas_del_liderazgo_autocratico.pdfIn PDF document text
    • https://cdn.sqhk.co/natokaze/fIhbgjy/23084775880.pdfIn PDF document text
    • https://cdn.sqhk.co/wigatozaduw/hcyljhl/samsung_j1_my_files_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/ruxodinumoro/kWidgg4/business_process_management_free_download.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/vavale/43752926717.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a80b1e44-beff-4817-87c5-4abd325684ce/what_does_lifting_the_veil_mean.pdfIn PDF document text
    • https://f74ea38a-ab8d-49a0-8d31-9a1d7ce64423.filesusr.com/ugd/5ceade_a0dd8f9e9b2440eca9d04efd64834584.pdf?index=trueIn PDF document text
    • http://jewofeket.onlinewebshop.net/83280163973.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/12996879323.pdfIn PDF document text
    • https://d4cba69e-f3c5-4a64-9e40-69ba24924691.filesusr.com/ugd/b73feb_8d3d5d544db740ab8d0c81116bc641cb.pdf?index=trueIn PDF document text
    • https://c145ee04-3c3b-4786-8b94-e0511401b322.filesusr.com/ugd/de65f7_6a1d5a228fa94c66908d22ab3996eb0e.pdf?index=trueIn PDF document text
    • https://fa5d8e44-005d-4c05-925d-ba60cb7f5023.filesusr.com/ugd/121e37_aed3d5afcfcc40438a8643c910e1458f.pdf?index=trueIn PDF document text
    • https://2e4b0ed6-c237-476e-b23b-7c95f147629f.filesusr.com/ugd/30e930_00d367726117417c8585da42aeff4b32.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f06843c0-6ba5-458e-a141-ce04a422319c/hp_laserjet_4200n_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/zabefoxojuzoselox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6237c8bf-4e6e-4573-a60e-b6f54d1d75d2/algebra_nation_section_9_test_yourself_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/dudujopixejikug/chicago_manual_style_16th_edition_bibliography_sample.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4751588c-a3b7-405f-a1e7-3d5554b6920f/how_to_repair_broken_transmission_line.pdfIn PDF document text
    • http://kopurelotalad.onlinewebshop.net/lidosoruxijupapuvavabo.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_off0000f6a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A1 5312 bytes
SHA-256: 60a58fc7a5b6b80535f27a27f3cf2d5908c8df877d977f19fa1483d6bbfdb2d8
font_01_sfnt_off00010892.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10892 13212 bytes
SHA-256: 3cb48718b2c347bfdb5ab96eeebfb0afcfd0993a9d2eebbb7c120176b61b1aec

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