Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e556165d3f9fe5e…

MALICIOUS

PDF

78.4 KB Created: 2021-03-09 12:28:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 05420b6b8b9dbe75a7920f16f6d56c71 SHA-1: a2a63f7ef4a5a33cfea8b420b64d36aae15d0108 SHA-256: 2e556165d3f9fe5eadb50d55cda5b129b09d05b718b1d51c67c4f6100e1d418a
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, with one specifically pointing to 'maypoin.ru/award' which is suggestive of a phishing lure related to bank aptitude tests. The presence of multiple disposable hosting links further supports a malicious intent to distribute potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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 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://maypoin.ru/award?keyword=bank+aptitude+test+questions+pdf PDF link annotation
    • http://rezltml.xyz/new_design_for_ppte535e.pdfIn PDF document text
    • https://cdn.sqhk.co/kixobaza/8ghYdig/30595299006.pdfIn PDF document text
    • http://juwupexutaval.mywebcommunity.org/dolukunafawubunikusas.pdfIn PDF document text
    • http://laitlabs.pro/alaipayuthey_bgm_songs_in_masstamilanpucvd.pdfIn PDF document text
    • https://cdn.sqhk.co/guranotup/t0Ihe5a/shoot_em_up_2_movie_download_in_tamil.pdfIn PDF document text
    • https://cdn.sqhk.co/fikubife/KxHkNge/ghost_chatbot_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/zedozomi/hfLZ73D/picot_question_examples_for_nursing_education.pdfIn PDF document text
    • http://rozujed.sportsontheweb.net/52971868841.pdfIn PDF document text
    • http://es50off.pro/82304230693kzxti.pdfIn PDF document text
    • http://fabermanufacture.ru/the_tale_of_peter_rabbit_and_benjamin_bunny_dvdpijal.pdfIn PDF document text
    • http://wejuzofibab.medianewsonline.com/48959368641.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/014c943c-2d10-402c-b3c8-bd55e4d14719/vixuwupaluvomiber.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/245aae55-508a-4057-b70d-66fc776e1389/jateg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41c5bffd-b1c6-4130-8d39-0f473680b2cf/problem_solution_text_structure_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4039787a-9f3b-49e3-9f7c-a04660e0d0a9/dewalt_xrp_drill_kit.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/ruvojolosit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44d827e3-6cc6-47a4-9e5c-6fb0acdee46c/how_to_adjust_diamond_bow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e6773c7-1dba-4e26-a227-3e4ccd0cccfe/texas_instruments_baii_plus_student_edition.pdfIn PDF document text
    • http://zuxokoberibaw.atwebpages.com/socratic_questioning_examples_in_therapy.pdfIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/how_to_gift_wrap_step_by_step.pdfIn PDF document text
    • https://s3.amazonaws.com/wobuzisibal/free_printable_doubling_and_halving_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6bfce1f-fbec-4e8e-a977-01067eb2b281/verb_preposition_collocations_exercises.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6456dbe3-c98d-4a85-932b-a76e410c34c6/notekexotazite.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21710f05-418d-4706-9b4f-0dd5464c4f21/how_to_program_distech_controls_thermostat.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/83431316468.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_off0000f679.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF679 5144 bytes
SHA-256: cbc334e9cd16a8301d2328a521f7f617cfee0e94bdbecb18b066e28332bbfec8
font_01_sfnt_off00010819.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10819 10500 bytes
SHA-256: a6cc9f66b4ca95812a0e07aa7badb8d096ac26099190c55df733ca5ecbcf57fe