Malicious PDF — malware analysis report

Static analysis result for SHA-256 5adccb9f3ca460a3…

MALICIOUS

PDF

80.7 KB Created: 2021-03-02 22:20:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0fcdd84a57d208f513d521b894e3a5bf SHA-1: 2b7727c48a4d9095616613e40705372bc45493dc SHA-256: 5adccb9f3ca460a3b10f21286b254f76ac916fd8c09344b0555e780147cf3767
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jumiwimov.ru/strik?utm_term=denon+dht-s514+soundbar+with+wireless+subwoofer PDF link annotation
    • https://jubewujug.weebly.com/uploads/1/3/4/6/134653216/mofotunabobej.pdfIn PDF document text
    • https://ruvawigalovenu.weebly.com/uploads/1/3/4/3/134318686/4016835.pdfIn PDF document text
    • https://cdn.sqhk.co/pigajifaw/hh80Vhe/pentagonal_prism_volume_calculator.pdfIn PDF document text
    • https://ninijaliwejito.weebly.com/uploads/1/3/4/3/134350726/f28a6a3e1d434.pdfIn PDF document text
    • https://kavuxidawikux.weebly.com/uploads/1/3/4/0/134000359/9f19ab1bdc5.pdfIn PDF document text
    • https://cdn.sqhk.co/lisesemafo/ehghbid/jubitupagimimeguxukofo.pdfIn PDF document text
    • https://cdn.sqhk.co/futidiwe/jicgijj/tours_las_vegas_los_angeles_san_francisco.pdfIn PDF document text
    • http://sokinabunerir.iblogger.org/graphing_stories_and_situations_worksheet.pdfIn PDF document text
    • https://semulojera.weebly.com/uploads/1/3/2/6/132695334/namanub-kewetapobabowur-nesamodera-walataseneki.pdfIn PDF document text
    • http://gogemupiru.22web.org/cullman_city_schools_report_card.pdfIn PDF document text
    • https://cdn.sqhk.co/dupeguwova/cdkhbhb/class_9_science_ncert_solutions_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/sowewazulejewi/xaxufilujupakikazugexati.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/48054922244.pdfIn PDF document text
    • https://s3.amazonaws.com/zemunomipazikez/bullet_raja_movie_song_pagalworld.pdfIn PDF document text
    • https://s3.amazonaws.com/jufowokedunod/action_bar_searchview_android_example.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/36323685800.pdfIn PDF document text
    • https://s3.amazonaws.com/jejulurowev/64066663216.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_off0000fee2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE2 5520 bytes
SHA-256: 68140d27acdaee1ce69bf975632ace91753102a5f88d7036c64c21aa40844e21
font_01_sfnt_off000111cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111CD 10344 bytes
SHA-256: 1d5bdf1a492818424f470380cb2046cd63ea28ff385b10269b008cc6c103e1a6