Malicious PDF — malware analysis report

Static analysis result for SHA-256 220194b4dd52e1c7…

MALICIOUS

PDF

82.1 KB Created: 2021-03-25 12:38:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 8a7c6c0c20bc87ffd5bc9becffec4f4d SHA-1: b58fc8c04ce5ba7a53a1fea98c537f62f25e7e28 SHA-256: 220194b4dd52e1c78716b050660a22566bd139d57cd6d4e26380161734704a54
126 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://fokemale.ru/wix?keyword=minnie+mouse+car+seat+stroller+combo PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4427093/normal_6056389033d46.pdfIn PDF document text
    • http://dommasters.site/sandisk_sansa_mp3_player_battery_replacement3zvqf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464055/normal_5fd34e41b25c6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404308/normal_5ff4d2a934d50.pdfIn PDF document text
    • http://bafedudovodamo.medianewsonline.com/32516238422.pdfIn PDF document text
    • http://gafaneripebenu.iblogger.org/presentation_folder_template.pdfIn PDF document text
    • http://sitizinudex.getenjoyment.net/computer_organization_and_assembly_language_book.pdfIn PDF document text
    • http://biolinkus.me/gumebekiriduvusuwiqo3p3.pdfIn PDF document text
    • http://mukidulutovig.iblogger.org/terraria_1._3_android_1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463551/normal_6011137fb7018.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lolefijulakemi.rf.gd/juvezivisozipok.pdfIn PDF document text
    • http://zujakogi.onlinewebshop.net/bse_odisha_9th_class_science_book.pdfIn PDF document text
    • https://f7cac2f2-528f-490f-9bef-cb2448a877de.filesusr.com/ugd/529ba0_7d349a0e2b0e4728a7b4f6f39ac31aa5.pdf?index=trueIn PDF document text
    • http://xowuzafojizoma.epizy.com/simple_offer_letter_format.pdfIn PDF document text
    • http://zewogukanonudut.epizy.com/what_does_the_b_word_mean_in_english.pdfIn PDF document text
    • https://77a48bbd-706a-45f8-a225-ac1cc02029d7.filesusr.com/ugd/3be48b_63fb2e98bb9e446a939679fd97f4838f.pdf?index=trueIn PDF document text
    • http://wififeju.atwebpages.com/how_to_use_safety_1st_humidifier.pdfIn PDF document text
    • http://nibemodida.myartsonline.com/can_you_connect_soundbar_to_alexa.pdfIn PDF document text
    • http://fodimezafizuver.epizy.com/how_to_look_up_drivers_license_online.pdfIn PDF document text
    • https://f9fc249e-2e6a-4908-9eb0-88005465a50d.filesusr.com/ugd/2530ee_075fe9d7a8b34c6ca73e7c9ac144bc68.pdf?index=trueIn PDF document text
    • http://remosinidad.rf.gd/tatalaksana_meningitis_tb.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B7 6588 bytes
SHA-256: 4e1a9c4cb32f1bc4ff176ae4dc1460c31b2d267bf2def0252f23ad2731e7be72
font_01_sfnt_off00010430.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10430 5088 bytes
SHA-256: 977cf6d73b03c1b20802c38a303354cfa5f9855c170b950388b7cbc89e11ca37
font_02_sfnt_off0001156e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1156E 10944 bytes
SHA-256: 5ef4016af6ba87009b77b7d76d1e35b7da96cd49cb2119cc8de1a214352327c5