Malicious PDF — malware analysis report

Static analysis result for SHA-256 df795b82d84e8ebc…

MALICIOUS

PDF

71.8 KB Created: 2021-02-01 11:41:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 41e56dd97c4e812791f0de37fdddc75b SHA-1: ee29ba0734c83e2696c0e42717cdff29f634e5e2 SHA-256: df795b82d84e8ebcdd943352306060f5408fcc0ea5b5f4f055207826dd8aee4b
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable hosting or link farms, suggesting a phishing or scam campaign. The document body, though heavily obfuscated, contains text related to "Oceanography merit badge answers", likely a lure to entice users to click on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/123?utm_term=oceanography+merit+badge+answers PDF link annotation
    • http://potoborotagivud.22web.org/dow_corning_glazing_sealant_data_sheet.pdfIn PDF document text
    • https://fukituxepuronip.weebly.com/uploads/1/3/4/6/134605821/mutexubawixetef.pdfIn PDF document text
    • https://navemozozaju.weebly.com/uploads/1/3/1/1/131164567/1661538.pdfIn PDF document text
    • https://cdn.sqhk.co/perigupa/aghhacs/world_war_2_movies_2017.pdfIn PDF document text
    • http://jozarizotugi.22web.org/loseferamuzaduwotunosu.pdfIn PDF document text
    • https://cdn.sqhk.co/zodozane/BLmM2gg/othello_school_district_superintendent.pdfIn PDF document text
    • https://cdn.sqhk.co/pomiwuximu/xxQhbhi/social_media_marketing_job_description_sample.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pisatetakedabak.epizy.com/66533383779.pdfIn PDF document text
    • http://wawopuviginase.epizy.com/hpv_vaccine_bc_guidelines.pdfIn PDF document text
    • http://ritofeli.epizy.com/light_energy_worksheet.pdfIn PDF document text
    • http://vonanovab.epizy.com/46150213172.pdfIn PDF document text
    • http://luloxefisamo.rf.gd/bravo_cx7000_id_card_printer_driver.pdfIn PDF document text
    • http://bajivuselome.epizy.com/platform_toolset_v141_install.pdfIn PDF document text
    • http://radoletoma.epizy.com/annexure_c_form_for_pensioners.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_off0000dafa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAFA 5816 bytes
SHA-256: 1632046d12bfb6688202302d90e75da8508e0bc7e1c0d22edc5ed619147571f6
font_01_sfnt_off0000eea3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA3 9956 bytes
SHA-256: bfb656dc77a547550788844f5a6f32ca69abcce3d7c33f9ebc823c5fd51d4625

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