Malicious PDF — malware analysis report

Static analysis result for SHA-256 db7c49050aefcf00…

MALICIOUS

PDF

99.4 KB Created: 2021-03-17 03:49:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 26b100c6214d313760efe52f59273e05 SHA-1: c9f4878b556f4526e4ee6992826dd7bfef0a72f9 SHA-256: db7c49050aefcf00f4157c8424fc3311d6f661e3e8705243f646523130e1ca69
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, references 'Creational design patterns real world examples', likely a pretext to drive users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/strik?utm_term=creational+design+patterns+real+world+examples PDF link annotation
    • http://zizubur.22web.org/partial_budget_analysis.pdfIn PDF document text
    • http://jipujitematane.iblogger.org/java_8_update_201_download.pdfIn PDF document text
    • http://vijufik.iblogger.org/apa_style_format_example_paper.pdfIn PDF document text
    • http://kojurebajalafaw.22web.org/best_flash_video_er_chrome_extension.pdfIn PDF document text
    • http://mobutadaxez.medianewsonline.com/laboratory_experiments_in_microbiology_10th_edition.pdfIn PDF document text
    • http://vokotavawer.iblogger.org/tear_soup_book_review.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505837/normal_6029e4163a75d.pdfIn PDF document text
    • http://segaruzobuguses.scienceontheweb.net/what_are_some_aggressive_behaviors.pdfIn PDF document text
    • http://gezilobogobig.22web.org/keliwibikogen.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374545/normal_601128ccd61b0.pdfIn PDF document text
    • http://tonemisi.medianewsonline.com/pozofuxal.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zeledevunetoxow.rf.gd/motu_patlu_ke_cartoon_video.pdfIn PDF document text
    • http://fujafinu.epizy.com/26615762752.pdfIn PDF document text
    • http://tiginusoxer.rf.gd/nolewu.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/foloravonefunag.pdfIn PDF document text
    • http://sawutex.rf.gd/tigikubik.pdfIn PDF document text
    • https://s3.amazonaws.com/mefonevimimix/android_mobile_battery_charging_tips.pdfIn PDF document text
    • http://bewukikakew.epizy.com/fewetujojexidakipe.pdfIn PDF document text
    • http://keluwuvofaj.epizy.com/96190921830.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_off00012f8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F8F 5344 bytes
SHA-256: 7666ba0589bb18fef6688fc86a54bfaa615ceb1b051bab25959d9acff7a6e862
font_01_sfnt_off000141b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141B8 12096 bytes
SHA-256: 3c3d3f6dbd53c5001351f8a9f8d88c70ad47d84e5318db1deb35b0db0529bb52
font_02_sfnt_off00016b38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B38 16064 bytes
SHA-256: c72b90224a3819ecb4df95d23212449dcf7016745c7ee066fd85b325348d32e1

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