Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba036046e32e92bf…

MALICIOUS

PDF

99.2 KB Created: 2021-03-30 13:41:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 4149eb7ad0484fecc03dc69efccf39bf SHA-1: 5ed0191ffc4268b0f88d9efc97fd65d6f9f6a04a SHA-256: ba036046e32e92bfcfbfa6a3bab3a00309bdb0289909ee178d4c9ca77bbcaf5b
192 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical finding for linking to known malicious redirector infrastructure. The document appears to function as a link farm, directing users to various disposable domains, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9945

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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/strik?utm_term=star+trek+discovery+season+2+episode+8+imdb In PDF document text
    • http://suwefazimim.medianewsonline.com/bachianas_brasileiras_no._5_guitar.pdfIn PDF document text
    • http://wefitibugajax.iblogger.org/q_see_pen_camera_manual.pdfIn PDF document text
    • http://wuwibapuwete.22web.org/southwest_airlines_information_systems.pdfIn PDF document text
    • http://evatopshop.xyz/negative_binomial_poisson_relationshipy8e0z.pdfIn PDF document text
    • http://wafixevewitope.mypressonline.com/gigukowupo.pdfIn PDF document text
    • http://xotujezal.mypressonline.com/proyecto_vivienda_bioclimatica.pdfIn PDF document text
    • http://medicalpracticementor.com/matotofoxaxiwigojiripatudf2jy6.pdfIn PDF document text
    • http://hightrade.club/what_is_the_best_3_quart_air_fryerezvic.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://lakiver.epizy.com/1340557416.pdfIn PDF document text
    • http://kosidigipetuvu.epizy.com/how_to_start_electronics_manufacturing_company.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e9267c4-4e55-4ac9-a36d-e2ab0ce61955/werevuxobikijonutodo.pdfIn PDF document text
    • http://famomijis.onlinewebshop.net/vofekefes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba29f195-c0b9-4d50-977e-7f150e162864/retowu.pdfIn PDF document text
    • https://2b095ecd-e7a3-45cb-a122-23ed11f0a332.filesusr.com/ugd/613052_9f1aac18844c42768aa7ebbf6f507a8d.pdf?index=trueIn PDF document text
    • http://sesoxevanadike.epizy.com/vefevejowutekipoxuxesaveb.pdfIn PDF document text
    • http://fukodagugino.rf.gd/acidity_of_substituted_phenols.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b62d30ef-e1cd-4d53-b004-a3f8678d0a1d/vasidijevigux.pdfIn PDF document text
    • http://vigukesege.epizy.com/bed_sheets_sets_king.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7a737e2-c67a-4608-820f-2267a5911435/dispositivos_de_procesamiento_hardware.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/196395dc-f82a-4f1c-9667-0c5729dd898f/sawuposebaf.pdfIn PDF document text
    • https://bed1e925-73f7-457c-87ff-53f226988024.filesusr.com/ugd/d4a8ce_b34ac68edd5243cf980f2b466b34e63f.pdf?index=trueIn PDF document text
    • https://abaaaae4-9231-44fc-b12c-ad55ebcc68e7.filesusr.com/ugd/2ca09c_dac22d531a564b04a29b204642dc3215.pdf?index=trueIn PDF document text
    • http://wajodojizofe.epizy.com/nawavarasilukup.pdfIn PDF document text
    • https://1e16da7b-5b4f-4122-a3c4-5c88c9d97cf7.filesusr.com/ugd/83f04e_44bae4bc4d17449dbc6130ffcd81ae23.pdf?index=trueIn PDF document text
    • http://bogalibamadom.myartsonline.com/paris_metro_tube_map.pdfIn PDF document text
    • http://sebubexegan.rf.gd/68018380870.pdfIn PDF document text
    • https://02408c19-b9f6-4996-a596-1d5b7e46c8d3.filesusr.com/ugd/c83fdb_c9ba8497923e478aa528e9dbf1ee119f.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001360b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1360B 5768 bytes
SHA-256: c26e75356712741b33ec956b6e9b3593789805abf98a067a9852aa0308bff1a4
font_01_sfnt_off0001498b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1498B 11808 bytes
SHA-256: 85ab5fc071e13be6c06f2cac3650ad9eb9dd93144988d0c64748c377f0aeefc6
font_02_sfnt_off0001719b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1719B 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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