Malicious PDF — malware analysis report

Static analysis result for SHA-256 0226fc6a20bc55d3…

MALICIOUS

PDF

88.6 KB Created: 2021-05-06 11:03:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: d4ea10f4c824d1a63bff5d61aff4e113 SHA-1: 80aafb044f2a890692716ef38b1b1275e15928c4 SHA-256: 0226fc6a20bc55d315e028ee734fbd447fafe192ec7b2457da70e82ecc4080b6
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 attempt. It contains numerous embedded URLs, with a primary suspicious URL pointing to 'bologen.ru', likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, contains text related to search terms, further supporting the phishing lure.

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://bologen.ru/strik?utm_term=frosty+the+snowman+chords+gene+autry PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481173/normal_5fe7c59cbf728.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425759/normal_604d1322d211b.pdfIn PDF document text
    • http://forecast.bet/new_catholic_encyclopedia_1967_onliney4io1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391636/normal_602007652066e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489061/normal_5fccab2bc615b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4529095/normal_5fde05187b6d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412899/normal_6056e30e1fca7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460466/normal_60200bae26886.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460255/normal_60538d3d3281b.pdfIn PDF document text
    • http://good-production9.site/parking_fine_appeal_letter_template_ukk9057.pdfIn PDF document text
    • http://animoney.xyz/95012642383ebbgl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393763/normal_604b6364528c1.pdfIn PDF document text
    • http://ceter.xyz/romeo_and_juliet_book_vs_movie_1968jp1jw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404969/normal_5ffd755ad73bd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3e1ae61b-6b68-46dc-8a90-d1c7a5b9f91c.filesusr.com/ugd/b8bbd7_cdeeaa482b5744ada892600164a58020.pdf?index=trueIn PDF document text
    • https://03f57db0-fbcf-46ec-8713-21b5992b8512.filesusr.com/ugd/455f95_e12b9984adb5433ea89de6e34c3be423.pdf?index=trueIn PDF document text
    • https://80ce5912-1c67-4773-adf4-abf614566e91.filesusr.com/ugd/acb48a_da5e24b0f8c2417c803d90ffda50869c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ef17a9b-683a-4811-8ed0-29149dab4f3d/productos_contestados_del_curso_aprendizajes_clave_para_directores_primaria.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f455dbb7-fa2f-4ea6-b35c-8030ffe8bdff/first_aid_qa_for_the_usmle_step_1_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/092536be-44c6-4d45-b9c3-2381bc4a4731/jerobuvidi.pdfIn PDF document text
    • https://ca3ec1ac-6ff7-4c8f-ae0f-86a30d86e335.filesusr.com/ugd/3615fb_6e9a31506d5a40e3996291a44e27a9ab.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/12b0e04b-0caf-496d-acdc-28181e6c7c8d/wexilipofuzam.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_off00011b6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B6D 5472 bytes
SHA-256: d8dc7dd0320a365dd604a7b01c9fee273867b0c2702d10bc86a8fdabda875aeb
font_01_sfnt_off00012df2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DF2 11592 bytes
SHA-256: 5011db329514cc33b17d741498f701cb05f01906284863ef8220bb6c69747650

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