Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ed7a4a2bcdbd920…

MALICIOUS

PDF

85.8 KB Created: 2021-02-27 20:47:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 4c6d6bc654e68d10ffdf6cd108fafe71 SHA-1: 8edb1abd9cee10658cfddefd3f2eb0fba682c15d SHA-256: 8ed7a4a2bcdbd9201df4afb9129c8a2edcaf02327361bf71886e32b391e576a7
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, contains text related to a Panasonic TV issue, which is likely a lure to encourage users to click the embedded malicious URL. The presence of numerous external URIs, many on disposable hosting, further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://fokemale.ru/strik?utm_term=i+can%2527t+turn+on+my+panasonic+tv PDF link annotation
    • http://zapizimibit.22web.org/simple_travel_expense_report_template.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409799/normal_600e16de8ffbd.pdfIn PDF document text
    • http://gejopuzebizovuk.iblogger.org/nepowelepidevu.pdfIn PDF document text
    • http://insurancesouk.com/sumupewexikoxatukopewegotsyo9s.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426556/normal_60386bcf94c8f.pdfIn PDF document text
    • http://bilabugova.iblogger.org/13430496626.pdfIn PDF document text
    • http://pajebunekelisom.22web.org/40805686209.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417990/normal_5ffe41495b603.pdfIn PDF document text
    • http://philonio.online/18653091838bnyet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jomufutoxafu.epizy.com/popusamonibut.pdfIn PDF document text
    • http://xizokokov.epizy.com/wuzupisugibupakuzuwusajob.pdfIn PDF document text
    • http://bepowawon.rf.gd/adobe_photoshop_cs6_tutorial_video_free.pdfIn PDF document text
    • http://pexaniruvuwuwe.rf.gd/manualidades_faciles_para_nios_autistas.pdfIn PDF document text
    • http://jefebewo.epizy.com/chiari_malformation_basion_opisthion.pdfIn PDF document text
    • http://gagisejokunego.rf.gd/tuzalolowexiwewuwe.pdfIn PDF document text
    • http://gedesopow.rf.gd/zutuwatebupolirufifupupuk.pdfIn PDF document text
    • http://suwotewi.epizy.com/esl_pre_literacy_worksheets.pdfIn PDF document text
    • http://motinekan.epizy.com/alternance_informatique_airbus_toulouse.pdfIn PDF document text
    • http://vakazavitin.rf.gd/how_to_get_advanced_excel_skills.pdfIn PDF document text
    • http://keximatefabuzi.rf.gd/criminal_case_hile_apk_day.pdfIn PDF document text
    • http://duwewag.epizy.com/lepujavime.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fac5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC5 5180 bytes
SHA-256: abf43b592ba9d6348f2d711c69d082183725a61bb57b491ba98cfb52a3c7b2bb
font_01_sfnt_off00010c64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C64 11668 bytes
SHA-256: a2b39a2be428dd6a8bfa0fd85826947e87609d0658e0ee19a90364f29da77634
font_02_sfnt_off000133dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133DC 16336 bytes
SHA-256: e06fba4164ac16c165214f5f4232651daafdc404a58c7e7d1ab12f636b0c6cc1

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