Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e4da357a2c08cd2…

MALICIOUS

PDF

90.3 KB Created: 2021-04-21 19:31:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 335249c65994ad23fbc96d5c860e678b SHA-1: 0985c0f5b33139ae6c4e4724e692417ba61be095 SHA-256: 4e4da357a2c08cd249e53813b89893bdd23298a562f197c4ab2f110c78f15d6f
186 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 0.9991

Heuristics 6

  • 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 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.
  • 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://soxebez.ru/strik?utm_term=final+fantasy+7+remake+reddit+discussion PDF link annotation
    • https://cdn.sqhk.co/tijatabov/iifzhiS/agl_energy_market_cap.pdfIn PDF document text
    • http://sawemawe.mywebcommunity.org/how_do_i_setup_my_canon_printer_without_the_cd.pdfIn PDF document text
    • http://jidudilubad.mygamesonline.org/gipivaloxakev.pdfIn PDF document text
    • https://cdn.sqhk.co/jirudumom/jfhQjjd/flying_birds_png_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/varaxupumami/e7bIZib/beast_quest_series_14.pdfIn PDF document text
    • https://cdn.sqhk.co/badaxiloru/HLieheb/space_jam_jersey_lebron.pdfIn PDF document text
    • http://raponikidosal.getenjoyment.net/las_7_bellas_artes_definicion.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzaxepigi/6jdjgqo/download_train_track.pdfIn PDF document text
    • https://cdn.sqhk.co/tuxarulenogu/ijuR8ig/32432144919.pdfIn PDF document text
    • https://cdn.sqhk.co/wigalefu/2ajaje5/38317162049.pdfIn PDF document text
    • https://cdn.sqhk.co/virurewev/hjihgNf/90110160151.pdfIn PDF document text
    • https://cdn.sqhk.co/noneniwetav/eihjcnv/juveligaruxoj.pdfIn PDF document text
    • https://cdn.sqhk.co/fowizolomam/eheTEhb/video_recorder_screen_recorder_video_recorder_editor_download.pdfIn PDF document text
    • https://favujoki.weebly.com/uploads/1/3/5/3/135302790/c5ddbf81b99.pdfIn PDF document text
    • https://cdn.sqhk.co/roxigeve/p2jgzNV/24792919974.pdfIn PDF document text
    • http://nurigoluda.mygamesonline.org/28667724731.pdfIn PDF document text
    • http://wuwudikosegukem.mypressonline.com/55328291815.pdfIn PDF document text
    • https://lutomired.weebly.com/uploads/1/3/5/3/135316507/9007830.pdfIn PDF document text
    • https://cdn.sqhk.co/botuvawezej/Zdie4kX/nipiwenuzukijavav.pdfIn PDF document text
    • https://buzapakamewogu.weebly.com/uploads/1/3/4/3/134366326/jobamufanaku_wepowekofo_xokagolesa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vujadexofon.atwebpages.com/pupafafuxiduxil.pdfIn PDF document text
    • http://gezixus.myartsonline.com/zarewapaxin.pdfIn PDF document text
    • http://pojozija.onlinewebshop.net/tetadawudidosek.pdfIn PDF document text
    • http://kutoxinupuroxo.onlinewebshop.net/91660344922.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_off0001220d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1220D 5368 bytes
SHA-256: 308c66e80fecd517d2fb811432419e7a2b1f13d50e6255c92420d7d015a813d1
font_01_sfnt_off00013452.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13452 11624 bytes
SHA-256: 313f135b9d8457da81d87297c3bffe1cd2a53798e265c4750f7f0a296ef8260a

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