Malicious PDF — malware analysis report

Static analysis result for SHA-256 720fd993fa7aad3f…

MALICIOUS

PDF

78.4 KB Created: 2021-03-16 09:05:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 94ee1a2bfc91495984b59eb7070ce472 SHA-1: f7d594f15d1658d4a488359e8564741498c7fdf9 SHA-256: 720fd993fa7aad3f9e4a889d927bfecfe7d4b314682953e5d0971a289377f85f
126 Risk Score

Malware Insights

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

The sample is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs, many pointing to disposable hosting, suggesting a link farm or phishing campaign. The PDF structure and embedded URLs are indicative of a spearphishing attachment, designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://midufefew.ru/wix?keyword=boda+de+marco+antonio+solis+jr PDF link annotation
    • http://familyit.pro/tai_chi_24_step_slow_motionwnf0v.pdfIn PDF document text
    • https://cdn.sqhk.co/tabotewo/fgi5oJk/36438773408.pdfIn PDF document text
    • http://ludirobus.getenjoyment.net/swat_training_ideas.pdfIn PDF document text
    • http://letxxnx.org/dewuzerenimofijaxorudezn3bbm.pdfIn PDF document text
    • http://shoop-fo.ru/79069600127oluyk.pdfIn PDF document text
    • http://giocodigital.website/valiant_force_building_guide7x3qo.pdfIn PDF document text
    • http://pedagodogiko.getenjoyment.net/how_do_i_get_my_original_birth_certificate_before_adoption.pdfIn PDF document text
    • http://pebonemariv.mypressonline.com/28905569357.pdfIn PDF document text
    • http://aycotoro6.xyz/r22_refrigerant_charging_procedure0jr3t.pdfIn PDF document text
    • http://regsenatvumen.website/58797756821x27zt.pdfIn PDF document text
    • http://vazawujuzu.sportsontheweb.net/xesatafivuwigixotisoz.pdfIn PDF document text
    • https://cdn.sqhk.co/xamapetarel/swy3eii/45365405829.pdfIn PDF document text
    • http://itanto.space/how_to_program_a_genie_excelerator_garage_door_remotevd4bz.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/gurupixabogivaz/reporting_bartlett_s_test_of_sphericity_apa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/527631ca-63cf-4e21-8c1a-d5983199fe7f/netgear_prosafe_gs108e_configuration_utility.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d5fdf68-c26c-4538-b5a5-fb645b81c309/ravuwafozure.pdfIn PDF document text
    • http://vekisofekibote.myartsonline.com/abuela_invents_the_zero_conflict.pdfIn PDF document text
    • https://s3.amazonaws.com/zonivezada/100518884.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd29a6b0-1dd7-43ed-a8a5-a8fc956d481d/el_pequeo_vampiro_libro_completo.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/google_chrome_terbaru_offline_installer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/482b1c6a-7182-4f92-9d2d-01e64b3d753a/is_focusrite_scarlett_good.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb726086-e694-499f-8080-75e4d7b71fbd/difference_between_food_web_and_food_chain.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/bidenadu.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_off0000eff7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF7 5212 bytes
SHA-256: 6687e2716e23f7e40156d871ac2abc3334c98904a7c228a8eeff5180c109af7c
font_01_sfnt_off00010198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10198 12484 bytes
SHA-256: ac126b359808f9abfa6f33c92ad5dc67ec99728de1f00a45449e35e70196c4d4

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