Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed23ca2b6a204ca3…

MALICIOUS

PDF

79.2 KB Created: 2021-03-12 13:57:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 697d60c438fceb9a7daff571d52e9796 SHA-1: a6705b4e79b579176cc6f11a79677795d5b627aa SHA-256: ed23ca2b6a204ca360121e13f538cddabe88a7faa0c73e868f423ac1eee3bf05
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or phishing operation. The document body is heavily obfuscated, but the presence of numerous external URIs and the PDF_SEO_LINK_FARM heuristic strongly suggest the file's purpose is to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=best+picture+settings+for+samsung+4k+tv+qled PDF link annotation
    • http://vudifabofugejij.medianewsonline.com/viper_auto_start_draining_battery.pdfIn PDF document text
    • https://cdn.sqhk.co/sawibevas/gijblGO/22566100788.pdfIn PDF document text
    • http://zapitexidij.mypressonline.com/65338599042.pdfIn PDF document text
    • http://pogawubujogeje.mypressonline.com/wordpress_admin_password_reset_phpmyadmin.pdfIn PDF document text
    • https://cdn.sqhk.co/xiruregexibe/c6Uhjjb/skyward_ccisd_family_access.pdfIn PDF document text
    • http://pirawamajakemiv.22web.org/71783472236.pdfIn PDF document text
    • https://cdn.sqhk.co/maxegugej/hbihifZ/45954320115.pdfIn PDF document text
    • http://likedizar.medianewsonline.com/meaning_of_air_pollution.pdfIn PDF document text
    • https://cdn.sqhk.co/sebutarukaw/yhiijdW/free_music_apps_for_computer.pdfIn PDF document text
    • http://kaverijamawe.iblogger.org/toro_timecutter_ss5000_blade_replacement.pdfIn PDF document text
    • https://cdn.sqhk.co/juxerawabuf/Chewgdn/download_stickman_destruction_4.pdfIn PDF document text
    • https://cdn.sqhk.co/lisupixiwe/gjadujd/heartstart_defibrillator_pads.pdfIn PDF document text
    • http://xofebuledat.scienceontheweb.net/fizuluwinud.pdfIn PDF document text
    • https://cdn.sqhk.co/ramawuvade/ijgejfQ/planet_coaster_sandbox_without_unlimited_money.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://bb491b24-4c81-4ccc-8daa-bf1baeb171c2.filesusr.com/ugd/93c935_bdddf767351841b78aa0c4e9db8d2f2a.pdf?index=trueIn PDF document text
    • https://d1897088-ef6e-4b60-8303-910b4b551fc1.filesusr.com/ugd/4cfbbd_d249543d17a941b69efef5586c107880.pdf?index=trueIn PDF document text
    • https://46c19374-600d-43be-a5f2-d8bf07c6fddf.filesusr.com/ugd/cc94a4_04ec383eabf84189a7a9789d37d1e6de.pdf?index=trueIn PDF document text
    • https://c788b29d-df2d-4d46-9946-349e8cce89b7.filesusr.com/ugd/a9e086_a4a67fb4ac684c29bc3a364f41811288.pdf?index=trueIn PDF document text
    • https://30f21d72-2b41-4965-a7bc-2abb02bf1ded.filesusr.com/ugd/47e66e_3bb3790054a2471b9c34cb33f88e9d90.pdf?index=trueIn PDF document text
    • https://0778d94d-b67d-49c3-8f6f-43f52d6edec9.filesusr.com/ugd/b85eb0_ba08a13d5f904c9082a99b944d627d69.pdf?index=trueIn PDF document text
    • http://seladetitogar.epizy.com/losavegika.pdfIn PDF document text
    • http://xasiruzate.rf.gd/autocad_commands_file_download.pdfIn PDF document text
    • https://ce322291-b3da-4cc2-ae0f-523e25daec44.filesusr.com/ugd/4530da_fd48001be1a74e06a2516dcf1b2d7c11.pdf?index=trueIn PDF document text
    • http://bemuvubovewe.epizy.com/reformas_borbonicas_economicas_y_administrativas.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_off0000f70f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF70F 5864 bytes
SHA-256: 9a0f4e150367b22275a2033b03f7826c05acdad942bfcd45f7a1e3ba57be5eb5
font_01_sfnt_off00010aff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AFF 10660 bytes
SHA-256: 17e4d6d59903047de1d146e79992eea646d4ea04392bd674885b46b99fbcef05

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