Malicious PDF — malware analysis report

Static analysis result for SHA-256 3be49cca3a67ae59…

MALICIOUS

PDF

69.2 KB Created: 2021-04-04 04:51:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: a58091807126cc43d8887fb1d7de121f SHA-1: 09d99afca80a050826f2b0f304b893aa42f7e60b SHA-256: 3be49cca3a67ae59541099222b8e1ac73bc9c593c0a3871a29c2642d9f5c43ca
184 Risk Score

Malware Insights

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

The PDF contains embedded URLs pointing to known malicious redirectors and disposable hosting, indicating a phishing or malware distribution attempt. ClamAV and ML classifiers confirm its malicious nature. The primary attack vector is likely spearphishing attachment, leading users to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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
  • 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 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://dafemum.ru/award?keyword=heap+sorting+algorithms+pdf In PDF document text
    • https://lupiwofuguneb.weebly.com/uploads/1/3/4/7/134715795/nixulutob_subugig.pdfIn PDF document text
    • http://youla-24.cc/how_to_cite_a_interview_in_apark026.pdfIn PDF document text
    • http://theplafond.xyz/58385072482bmpmq.pdfIn PDF document text
    • http://pufopiguzelefe.22web.org/damodaran_investment_valuation_3rd_edition_download.pdfIn PDF document text
    • https://zeradukiw.weebly.com/uploads/1/3/4/8/134883462/xusenogalejoluwe.pdfIn PDF document text
    • http://biwumani.mywebcommunity.org/41409398784.pdfIn PDF document text
    • http://fuxutigox.mypressonline.com/vegipukarukovotawoledozo.pdfIn PDF document text
    • https://lewebivaduxug.weebly.com/uploads/1/3/5/3/135392118/dozofonoje_ragibomeporenaf_fepugug_wukakosajigad.pdfIn PDF document text
    • https://vabeliguteziji.weebly.com/uploads/1/3/1/3/131379360/gafogo-ninowado-zosuzukifov-susipew.pdfIn PDF document text
    • http://bonmarket.site/wemorazixefi7aht.pdfIn PDF document text
    • http://tameeniraq.com/sirakamexiginufx9h0h.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://88211235-bf86-4d40-a6ec-a052db2f682e.filesusr.com/ugd/94e5ef_2b491e4b783e447a8d2890143376985b.pdf?index=trueIn PDF document text
    • http://xetumerim.rf.gd/sijuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00cbdfe8-e5c0-4919-bf77-141ffabb6b32/motorola_xts_5000r_specs.pdfIn PDF document text
    • http://zutugidod.onlinewebshop.net/4019822679.pdfIn PDF document text
    • https://a815f367-2516-4b88-9496-eed07d5c1eb7.filesusr.com/ugd/665c20_80f53531192e4ac6b077d0299e537889.pdf?index=trueIn PDF document text
    • http://fivomasabod.rf.gd/the_octoroon_play.pdfIn PDF document text
    • http://noroved.myartsonline.com/becoming_human_jean_vanier.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a95ffbff-d672-4666-be9a-22114f451141/67686994483.pdfIn PDF document text
    • http://piwolimosopobu.myartsonline.com/90046157904.pdfIn PDF document text
    • https://314f4944-3dd9-45af-b5ee-fc7f46c963e4.filesusr.com/ugd/73cb9e_80ed1981c3d14f74ae3bc39c41e71be4.pdf?index=trueIn PDF document text
    • http://lekazukexofa.rf.gd/54483065647.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9504e715-dfcd-4398-9832-cd83bb1efdbd/7125641195.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19ea46f7-67e8-484d-b4b4-21ab48f1c48d/why_does_my_vizio_not_turn_on.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d6ea4e8-5a02-41dc-8323-64229442a4c7/pals_plus_assessment.pdfIn PDF document text
    • https://6d428a25-da86-44fa-8f13-5b0f09742281.filesusr.com/ugd/3649d2_ba47ee16b7574560a3d9b28cad082cc8.pdf?index=trueIn 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_off0000d135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD135 5416 bytes
SHA-256: d80f84572f73ef4a9dafd82093a45f0cd870b81382c864518a6f1acb3242b8d7
font_01_sfnt_off0000e36e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE36E 10460 bytes
SHA-256: aee26ef868ed159cc3dfdac4aa1f0ce8852a977cc789035a3f4bed09995a38a4