Malicious PDF — malware analysis report

Static analysis result for SHA-256 47db4baa81cabcee…

MALICIOUS

PDF

81.2 KB Created: 2021-03-04 04:40:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: e701aa3fdc665e65a4077d3334b3cc14 SHA-1: 7e842893cd7878c905ef9949ed12f004752586c4 SHA-256: 47db4baa81cabceee685c534395cacb54349232a8969cd38894b91fe5702449f
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, flagging it as a phishing trojan. Heuristics indicate it functions as a link farm, containing numerous external links to other PDF files hosted on disposable domains. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create PDFs from web content, further supporting the link farm hypothesis.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://nipisod.ru/strik?utm_term=acorde+de+piano+titanic PDF link annotation
    • http://milanomoda.site/2006_honda_odyssey_touring_engine_mountsi3mcq.pdfIn PDF document text
    • https://cdn.sqhk.co/videmixolute/iik74id/lyrical_photo_status_hack_apk.pdfIn PDF document text
    • https://xexiroxenokela.weebly.com/uploads/1/3/4/6/134613030/2f42fdce.pdfIn PDF document text
    • http://zibepifutidi.sportsontheweb.net/biduzituzizunoper.pdfIn PDF document text
    • https://cdn.sqhk.co/xexerekija/sZnifhc/dj_sound_mixer_app_apkpure.pdfIn PDF document text
    • http://mixed-rootwork.com/excel_vba_range_find_daten8hp3.pdfIn PDF document text
    • http://javebamugizal.66ghz.com/guvomerirawipafe.pdfIn PDF document text
    • https://cdn.sqhk.co/sarowojep/dgdgqid/talking_girl_app_for_android_download.pdfIn PDF document text
    • http://sevezor.scienceontheweb.net/fopixeleferegub.pdfIn PDF document text
    • http://dududuw.mypressonline.com/ashta_laxmi_stotram_telugu_mp3_download.pdfIn PDF document text
    • http://rasudilikid.mywebcommunity.org/the_wonder_weeks_book_vs_app.pdfIn PDF document text
    • http://xivisugewikoju.iblogger.org/viwematovo.pdfIn PDF document text
    • https://cdn.sqhk.co/vitozogog/hhghcij/crunchyroll_subscription_benefits.pdfIn PDF document text
    • https://cdn.sqhk.co/zanotunuzi/hjjRhfp/defumi.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://wejajesenopezoj.onlinewebshop.net/gujevilaligufaluzobed.pdfIn PDF document text
    • http://sudexixurijaxoz.atwebpages.com/vokutezaxugete.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_off0000e622.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE622 4632 bytes
SHA-256: a63886e5599070149502a4f184b302e3683a02aedf7c9da4be3987fe65ca3a0f
font_01_sfnt_off0000f5de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5DE 16824 bytes
SHA-256: 6add190c096197ff63e951495de21b2eff24a9bb8609cefc912175db63b86d4a
font_02_sfnt_off000127d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127D9 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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