Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2215cf598ba49d0…

MALICIOUS

PDF

161.4 KB Created: 2021-03-23 00:03:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: d105790b32ef4588172ad6411905e523 SHA-1: 23d4b6f4d882c353cc8a3d159b61ce3e804d8e1c SHA-256: e2215cf598ba49d0c8cc1054c80e440ddacaa246455a1ea4dc67ed2fd2712471
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high likelihood of this document being used for phishing or distributing further malware. The presence of embedded URLs suggests an attempt to redirect the user to malicious sites, likely for credential harvesting or payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://botokaw.ru/strik?utm_term=jenkins+build+.net+on+linux PDF link annotation
    • https://xeruzorajudobux.weebly.com/uploads/1/3/4/6/134605969/besiwoneleravob.pdfIn PDF document text
    • https://garanokuwepo.weebly.com/uploads/1/3/0/8/130874617/gijuvar-bijodo.pdfIn PDF document text
    • http://whitetwo.space/ceh_study_guide_v943hmf.pdfIn PDF document text
    • http://megidexabaror.mywebcommunity.org/how_do_i_connect_my_jabra_to_my_macbook.pdfIn PDF document text
    • http://roxemoba.22web.org/37851345326.pdfIn PDF document text
    • https://sezibuginodeso.weebly.com/uploads/1/3/4/4/134470526/mabosenatijudum.pdfIn PDF document text
    • https://pavovebowejimop.weebly.com/uploads/1/3/1/6/131607108/8115061.pdfIn PDF document text
    • http://pixell.store/39872398524kyomg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://5efcf519-4c71-4be9-a00f-e1d47ba804c5.filesusr.com/ugd/ebcc4b_3d0d21893d944594bb4110f78044018a.pdf?index=trueIn PDF document text
    • https://c46c713f-5e69-4c64-aad4-d86f29440f76.filesusr.com/ugd/957c7b_c3be6a9171d7480a8b64774db5a6e2ec.pdf?index=trueIn PDF document text
    • http://xirexadugimog.atwebpages.com/stock_market_holidays_2021_india_nse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d212334a-4b58-4f60-88b9-b205e59588b7/how_to_read_vishnu_sahasranamam.pdfIn PDF document text
    • http://gezuvemun.rf.gd/88738004844.pdfIn PDF document text
    • https://3f7ff619-1e23-491c-a925-ddda4d79b49c.filesusr.com/ugd/79c22a_d2848976c85445b3af7861e5a3872025.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bb762de-17aa-4319-92f8-b4d4c2c8dc18/nivikojitugalolimigiba.pdfIn PDF document text
    • http://daroxupotebaliw.rf.gd/business_event_invitation_letter_template.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010752.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10752 100784 bytes
SHA-256: 5f1ab71e2149cfa468e0c3009166617ef5273e6626aed3b233ec8a093250d873
font_01_sfnt_off00023284.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23284 4688 bytes
SHA-256: db167290e8b82baf0411364e2c331ccb9a86785dc7bcb8455160a9d9b96e1b26
font_02_sfnt_off00024286.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24286 11452 bytes
SHA-256: ff2b939029195431492ada1df9d2c3e22f5ac39c95d91b40e3b7d5e194509342
font_03_sfnt_off000269c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x269C7 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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