Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecc28d40190fe046…

MALICIOUS

PDF

76.5 KB Created: 2021-02-15 12:00:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: ca8f24ce11fdde8c2cc90afa3b0d1b98 SHA-1: 1995656c66cfdb958f421375587bf8f5a0dc8497 SHA-256: ecc28d40190fe04614096d236d4d198b997e2c916014beaaddfce07f73d9b736
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The document contains a large number of embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of numerous external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly indicate a phishing or malware distribution attempt.

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://bologen.ru/strik?utm_term=how+often+to+change+wick+in+kerosene+heater PDF link annotation
    • http://kedejivebirago.iblogger.org/bizirudutogozovivi.pdfIn PDF document text
    • http://godubumoze.iblogger.org/the_reason_piano_sheet_music.pdfIn PDF document text
    • https://cdn.sqhk.co/ganuniwiku/jd36umm/rogipasatizatumalagusen.pdfIn PDF document text
    • http://velesvoyage.ru/25251836490ox1hh.pdfIn PDF document text
    • http://rollernefrit.xyz/devajivimetusofafiderzv5f.pdfIn PDF document text
    • http://jisugun.iblogger.org/tonowinisarixol.pdfIn PDF document text
    • http://realnoe-obshenie.online/14588885221fl4gw.pdfIn PDF document text
    • https://cdn.sqhk.co/luwibajik/emBvehr/15819596317.pdfIn PDF document text
    • http://kostlike.site/ribupejuwenuximikuf82y0s.pdfIn PDF document text
    • http://lixamewura.iblogger.org/41177783259.pdfIn PDF document text
    • https://cdn.sqhk.co/besiwowegin/jgHiljc/guitar_band_battle_apk_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://jefelaxe.epizy.com/vutugananofiw.pdfIn PDF document text
    • http://bejuxufuvojofa.rf.gd/51858621413.pdfIn PDF document text
    • http://ginojakoli.rf.gd/ethical_fashion_guide_nz_2019.pdfIn PDF document text
    • http://kaforezut.epizy.com/vilaxafudelu.pdfIn PDF document text
    • http://rurobudono.rf.gd/zexab.pdfIn PDF document text
    • http://zasogiw.epizy.com/dixutif.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/explaining_the_trinity_catholic_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/woxotopapozokev/fudirisovixodatekafaxaguz.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE326 5016 bytes
SHA-256: 07713e0ecd55ee056dacce26d6d8b3174479d0972e1dfd64e2e25a5a1bcec1d0
font_01_sfnt_off0000f437.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF437 9916 bytes
SHA-256: 3de7b1ed6243a509bb78f708021a0e3f37eeec826f9ee2dfe4fd6105201df52f
font_02_sfnt_off0001162b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1162B 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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