Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e040f246e89d39c…

MALICIOUS

PDF

75.0 KB Created: 2021-03-10 01:01:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 0091940cada7c7e2fe62b561916723fd SHA-1: 4e1bb5f2f24806743f972d1db604663ec9de6117 SHA-256: 3e040f246e89d39ce5d7933b82f3b114ca9171f3750046c6e50c9858e49c3e8d
244 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to known malicious redirectors or disposable hosting, indicating a link farm for SEO manipulation or phishing. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution lure, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wb?keyword=vizio%20smart%20tv%2060%20inch%20manual In PDF document text
    • https://lezojefob.weebly.com/uploads/1/3/5/3/135319065/205d606afbb9ab8.pdfIn PDF document text
    • http://damvglaz1.xyz/advanced_formulas_in_excel_2013ebxf6.pdfIn PDF document text
    • https://cdn.sqhk.co/sufokorume/jbjO8ie/how_to_fight_sisters_of_battle_hollow_knight.pdfIn PDF document text
    • https://cdn.sqhk.co/livixugakuf/cVjdujf/just_dance_2020_controller_switch.pdfIn PDF document text
    • http://remontlegko.info/marrow_app_hack_apkupzfo.pdfIn PDF document text
    • https://cdn.sqhk.co/daxerarugak/bhasqKU/audio_pro_addon_c10_vs_sonos_play_5.pdfIn PDF document text
    • https://xopavomubikun.weebly.com/uploads/1/3/4/8/134879687/favagepofurix-bomigojifuzo.pdfIn PDF document text
    • https://cdn.sqhk.co/zupitefa/ejj7jdr/92884369094.pdfIn PDF document text
    • https://cdn.sqhk.co/kizofapekeku/xKZgfRc/kewufasibevatusebasel.pdfIn PDF document text
    • http://qrettalq.online/71658362175mtvwo.pdfIn PDF document text
    • https://cdn.sqhk.co/kelufuro/AhbYNUJ/telegram_download_movies_app.pdfIn PDF document text
    • http://teachersaid.fun/basic_electrical_theory_in_hindidjajt.pdfIn PDF document text
    • https://cdn.sqhk.co/guregame/hixY9ge/wordscapes_level_8250.pdfIn PDF document text
    • https://gujejitemisadud.weebly.com/uploads/1/3/4/3/134354005/dapom.pdfIn PDF document text
    • http://freshka.fun/6902559038339xtf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1a9cd40a-f0d6-44d4-a143-19288280ca2b.filesusr.com/ugd/7a13df_ef19bf32249c45f18b34537df01f4eca.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jazamerijekufol/jopujatetoxor.pdfIn PDF document text
    • https://460eb545-5389-4aa9-9e78-d1074a8bca0c.filesusr.com/ugd/21a131_26879319f60a43be9065ec8ceb2ce6e2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bolovopizonuki/fuwajavogowasoj.pdfIn PDF document text
    • https://a0bbd489-bf03-48a0-8e93-88abd0751e5b.filesusr.com/ugd/370ea2_4cd4a1ccd4164813938db419017f1ca6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/remavuj/old_gulabi_aankhen_song_pagalworld.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/amelita_rae.pdfIn PDF document text
    • https://s3.amazonaws.com/dutuzanob/bevutixiriduvasunefarane.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_off0000e67e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE67E 5408 bytes
SHA-256: c9727d838910e97f83f30adb9163a1b4a94163db6b56b4e3b9372f66b244e91f
font_01_sfnt_off0000f8c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C2 10980 bytes
SHA-256: 83f8e900b4f87422b99df875b0485887cd98e904bf263d821b1614fb61fbf62a