Malicious PDF — malware analysis report

Static analysis result for SHA-256 e941937be5d3cf52…

MALICIOUS

PDF

74.9 KB Created: 2021-03-24 18:46:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 0edd77ed524f27261fa02aed4dc60605 SHA-1: f0272d0f3a2660eedb57b89b4e4a485bab2fffd6 SHA-256: e941937be5d3cf5263ecd9fa2ebbe4192ef7840de86a8f6b8b78ff735cd737b7
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malware. It contains numerous embedded URLs, with at least two pointing to suspicious domains ('soxebez.ru' and 'mxbur.fun') that are likely used to host malicious content or redirect users to phishing sites. The document body, though heavily obfuscated, suggests a lure related to an 'activity 6 food web worksheet', which is a common tactic for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://soxebez.ru/wix?keyword=activity+6+food+web+worksheet PDF link annotation
    • http://mxbur.fun/fiperagud4zcnr.pdfIn PDF document text
    • http://lishop.site/12th_chemistry_book_volume_1y2eqr.pdfIn PDF document text
    • http://geleostone.online/gibapokoxulipejulonabl2dqm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423454/normal_601907d61b2e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445331/normal_600bfe896b64d.pdfIn PDF document text
    • http://exampl1214.com/80707388848dms6e.pdfIn PDF document text
    • http://latencfsrt.space/3d_heart_puzzle_solution0gdwd.pdfIn PDF document text
    • http://igonlinesupport.com/54229357332uekqj.pdfIn PDF document text
    • http://golden-bridge.pro/vicks_humidifier_filter_targetc7pjn.pdfIn PDF document text
    • http://helplnstagramcontact6088758.com/mozilla_firefox_49.0_2_download16538.pdfIn PDF document text
    • http://naturebiolog.space/veg_recipes_for_dinner_in_hindim864e.pdfIn PDF document text
    • http://vitrinachel.ru/dual_fuel_champion_generator_reviews07078.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390371/normal_602be7c83e8f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459926/normal_603e519008e12.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/gawabog/turopafidow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/443d6c44-532c-41fc-bab9-60ef8d464ca0/lo_que_no_te_mata_te_hace_mas_fuerte_en_ingles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12438cea-907a-4d4b-a7c4-8baf1e5f89ac/golds_gym_treadmill_480.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6fed3ef-0bf1-4eb1-a6a3-e674def11673/99_names_of_allah_with_meanings_pictures.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/absolute_and_comparative_advantage_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/263883af-c4dc-4a12-a037-83fe504b6e14/fitekujupisuni.pdfIn PDF document text
    • https://s3.amazonaws.com/zetituri/the_white_tiger_movie_download_sdmoviespoint.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37147e2d-c578-4f5b-9b9c-cee884367402/78941544615.pdfIn PDF document text
    • http://magivaxinel.rf.gd/lebafibadawudik.pdfIn PDF document text
    • http://kisolapuri.rf.gd/how_to_set_a_600_edelbrock_carburetor.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_off0000ea50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA50 5468 bytes
SHA-256: da0f17a1b8476f23bb0bd386e933b0e806de2c165c15de86014c733f25b5297f
font_01_sfnt_off0000fd0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD0C 9740 bytes
SHA-256: 889fe46da7030f3b55dbfbede42f78ed8c2b99ab28538f7122d8619a61f538ce