Malicious PDF — malware analysis report

Static analysis result for SHA-256 30bf3a6f1d3e1602…

MALICIOUS

PDF

87.6 KB Created: 2021-04-03 22:34:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 93f4ffba9357ff76b9ea7bfd2fafaf5d SHA-1: 44d85589d0f98c399dc9e98d1331526b3075bc06 SHA-256: 30bf3a6f1d3e1602f3e9821ce98f8a04a431ddc31a9ef6ccb9d321c6d480c6b4
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying a link farm. One prominent external URI points to 'botokaw.ru', which is likely malicious. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing or trojan PDF. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 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.
  • 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://botokaw.ru/award?keyword=the+economist+21st+september+2020+pdf PDF link annotation
    • https://kilorokininoru.weebly.com/uploads/1/3/4/4/134470368/5410548.pdfIn PDF document text
    • https://koxizekeb.weebly.com/uploads/1/3/4/7/134770308/vokewisarajepabamuso.pdfIn PDF document text
    • https://xumebarukez.weebly.com/uploads/1/3/4/6/134687090/abdaf.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/galinikagopit/que_son_alimentos_antioxidantes.pdfIn PDF document text
    • https://536432c6-7160-4795-b32c-faef63afc1c8.filesusr.com/ugd/5e2347_7efc807d14c3451783894f53d68c4495.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dumupa/57799826271.pdfIn PDF document text
    • https://b46c4cda-4951-41c0-816f-bbf02eee4d9b.filesusr.com/ugd/4ff992_620230dd72434d25805fa4c22bdd222e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b78a712-0be2-424e-b1cc-edb87e4f5489/best_equalizer_settings_for_astro_a20.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5f3e30b-e45c-4625-a074-a20f44441fde/rupipowadatunugi.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/how_to_crack_cfa_level_1.pdfIn PDF document text
    • https://s3.amazonaws.com/jokotaziweluge/25732988596.pdfIn PDF document text
    • https://7abbf572-6989-4614-8246-9d5ba34cd238.filesusr.com/ugd/af841b_a63ff131a5ae4126938df352b12d23ba.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f21d1f2f-1fb6-487c-8c02-3b89dae15cf1/spice_and_wolf_season_2_episode_13.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b709624-8a12-4050-8ccb-976639620bda/65713670474.pdfIn PDF document text
    • https://79d8ee67-2172-45f8-9737-086b37aa5bdf.filesusr.com/ugd/2ab2ae_2c61c2b284be44cb80cd1044876c1afb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dakebesuvum/the_lion_the_witch_and_the_wardrobe_movie_disney.pdfIn PDF document text
    • https://8767aa75-4bd5-48c0-94ca-24e983238001.filesusr.com/ugd/debdc1_5c4d750bcd014f64850cf2da4b92f841.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/195b1ced-32f9-4e0d-b7b8-26e3d0779ed8/why_does_my_iphone_camera_take_pictures_upside_down.pdfIn PDF document text
    • https://s3.amazonaws.com/muvazi/46295707279.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/93610174684.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/pasimofevit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01db75be-968c-46d3-bac6-5aee4de6a4d3/how_to_become_a_trust_attorney.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c609053-e3ec-4647-8a7a-5096bdaff29f/windows_server_2012_r2_iso_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/722bfc14-50d9-49e9-970c-8ec372c8f927/lejabavev.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_off0001187a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1187A 5568 bytes
SHA-256: cd0ad16c97ec14e6a4634bde41c92c50080e2703f5d3576370f375779e3a5d9e
font_01_sfnt_off00012b40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B40 11420 bytes
SHA-256: d41e07ede946530ed1cad88448f90cd960cce8bea5eb81a17262b9e9f4811019