Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ba19ae9deb58990…

MALICIOUS

PDF

78.8 KB Created: 2021-04-05 22:54:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: a1ab09c85fe788b13ea3ee9542992526 SHA-1: 76b68fc36e2ae1aba55678db13f78dd803907ac1 SHA-256: 3ba19ae9deb58990d7a2fdc1d5cfe4f9b571472ac63b62ab85f18b1ab40e8bb1
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting services, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a link farm, likely to distribute malicious content or engage in phishing. The presence of external URIs and the overall structure suggest it's designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://ponafet.ru/strik?utm_term=el+coronel+no+tiene+le+escriba+resumen PDF link annotation
    • https://cdn.sqhk.co/regavebike/jhTZgj4/72929779595.pdfIn PDF document text
    • https://cdn.sqhk.co/suxujaba/gsX2ZpZ/59613976271.pdfIn PDF document text
    • https://cdn.sqhk.co/lazujanaziri/a8Xjau3/wolf_slots_slot_machines.pdfIn PDF document text
    • http://xodaxedepapopox.mygamesonline.org/xuloguwitumumikugofoz.pdfIn PDF document text
    • https://cdn.sqhk.co/lazimafuxuxi/fie7Tja/vidax.pdfIn PDF document text
    • https://cdn.sqhk.co/xopuwatipo/iidqXie/vuwanesekanodugologawixa.pdfIn PDF document text
    • https://cdn.sqhk.co/jagapifa/EDZIies/30470338996.pdfIn PDF document text
    • https://cdn.sqhk.co/peposusuwi/Oiaijq5/1375927972.pdfIn PDF document text
    • http://giwidesavezur.22web.org/coleman_evcon_mobile_home_furnace_parts.pdfIn PDF document text
    • http://bigijawiv.scienceontheweb.net/fufevozenetiwox.pdfIn PDF document text
    • http://jusukigib.sportsontheweb.net/xexuwupedodekurubavonixen.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/abc7d22d-ab82-41e9-9b30-985ae3c5d4f1/kadimirumozuf.pdfIn PDF document text
    • http://vupikefugogulup.epizy.com/volunteer_fire_department_incident_report_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec94662c-e3b3-4397-beda-1f1b480f28a8/is_the_warrior_diet_good_for_weight_loss.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02037ee6-8dbb-480c-a454-48c770619eb1/how_to_activate_ms_project_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5da085d0-d25d-4b6b-ae94-2ac27fa1b65b/how_to_become_a_storyteller_in_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdf1e41c-d1f1-4ce5-89f0-b7d859090af2/it_would_be_nice_synonym.pdfIn PDF document text
    • http://demajipo.rf.gd/character_letter_for_child_custody_template.pdfIn PDF document text
    • http://jinimivunom.epizy.com/77223334030.pdfIn PDF document text
    • http://nalelib.rf.gd/movies_free_hd_sites.pdfIn PDF document text
    • http://nabukewegurizev.rf.gd/kovasipivika.pdfIn PDF document text
    • http://ponazuxunuruko.rf.gd/how_long_should_an_oxygen_concentrator_last.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_off0000f3fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3FE 5040 bytes
SHA-256: 9b7fac3008ea39fbabf1313324461ab196f3c862098524edae14a9da037f265c
font_01_sfnt_off0001050d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1050D 11988 bytes
SHA-256: c1f3f089bdd100d0afcd39da6bb4f26a34050b67dddb08f9b32b52cef3028b56

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