Malicious PDF — malware analysis report

Static analysis result for SHA-256 bddc7bef8152e1d0…

MALICIOUS

PDF

82.9 KB Created: 2021-03-27 19:06:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 932d26754859a15434c162ffe08a7533 SHA-1: 58f77dd10172435ecf4046d42b84e1ea3ad73326 SHA-256: bddc7bef8152e1d08a6ea8dd309b1164d6de2b967cbd5a2ceebffef016890be2
206 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was flagged as malicious by a machine learning classifier and ClamAV. It employs social engineering tactics, specifically a lure to install a browser extension or update, which is a common method for distributing malware or stealing credentials. The document also contains numerous external URIs, some pointing to link farms on disposable hosting, suggesting a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://golowaki.ru/wix?keyword=great+midwest+conference+baseball PDF link annotation
    • http://mapugukabazewu.scienceontheweb.net/autocad_file_download_website.pdfIn PDF document text
    • https://cdn.sqhk.co/mukibusu/gejfKhd/2832257971.pdfIn PDF document text
    • http://difanitukovu.mywebcommunity.org/asvab_practice_test_free.pdfIn PDF document text
    • http://kixalilabuzawov.medianewsonline.com/581188622.pdfIn PDF document text
    • https://cdn.sqhk.co/keropolor/agdZJci/is_he_love_me_or_not.pdfIn PDF document text
    • https://cdn.sqhk.co/madagijoj/jfhjFsh/25994584450.pdfIn PDF document text
    • http://rowaxamapitowej.getenjoyment.net/dunkin_donuts_coffee_nutrition_information.pdfIn PDF document text
    • https://cdn.sqhk.co/saxezekobida/gcKjcNw/abordarea_simptomelor_in_farmacie.pdfIn PDF document text
    • http://liwadaxezaf.getenjoyment.net/plant_biochemistry_book.pdfIn PDF document text
    • http://xasedogamif.mypressonline.com/dubixesulibusufejasera.pdfIn PDF document text
    • https://nusuxoxoli.weebly.com/uploads/1/3/2/7/132710665/sinavika.pdfIn PDF document text
    • https://pafetujesotizi.weebly.com/uploads/1/3/5/3/135348857/e50788bf1aa.pdfIn PDF document text
    • http://jafoxidulez.mypressonline.com/parent_role_in_early_childhood_education.pdfIn PDF document text
    • https://guxilidokuwog.weebly.com/uploads/1/3/0/7/130738661/4eceea30730af.pdfIn PDF document text
    • https://cdn.sqhk.co/pivugisaxap/VXcKqhr/81463551722.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/nepali_guide_book_of_class_8_2073.pdfIn PDF document text
    • https://s3.amazonaws.com/mafavuzenoliki/zeduwukovetewesavuka.pdfIn PDF document text
    • https://254a6a59-343e-4b7e-907c-c4819e171fff.filesusr.com/ugd/decf6f_5ad948c5e55c4c4ab824fc3b53fd1a18.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pukiza/words_that_start_with_poly_and_their_definitions.pdfIn PDF document text
    • https://6cdf8c5e-36a0-4b6d-987f-32d3d50030cd.filesusr.com/ugd/3c2e2e_3d21619d9196445a94d39c16f780473b.pdf?index=trueIn PDF document text
    • https://321e46d8-a3e9-4523-905f-b0dcd1dcb7ef.filesusr.com/ugd/29fbc3_fdb7647aa9ee49d98ef8cb3a984492b4.pdf?index=trueIn PDF document text
    • https://4cf6c2b4-cd84-4b73-83b1-bf7f441162b2.filesusr.com/ugd/e50c99_346f57134d65448fb6c2725727a8d2c4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/viregujipowuru/18968153118.pdfIn PDF document text
    • http://kibagog.onlinewebshop.net/zokawonogoriwode.pdfIn PDF document text
    • https://b2d1eea7-aef5-47fc-962c-88b5513ecafc.filesusr.com/ugd/3a57bc_815d231c62604897bd1ce92419179b3e.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000104f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104F3 5432 bytes
SHA-256: 30b41f8aebbc0d21e8ccd0192935644b4fbaa41450e5d0aec378091f6d4bf7f4
font_01_sfnt_off00011769.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11769 11440 bytes
SHA-256: 6e30f2aa5d6302b5ddbd021306be699dd95cc3a0dc49cdced308ed433e98dad8

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