Malicious PDF — malware analysis report

Static analysis result for SHA-256 971d78127b220190…

MALICIOUS

PDF

71.3 KB Created: 2021-06-02 18:31:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f10224e28b8dbc4bdea6b56c70cc2a54 SHA-1: 10198323bcdd7705b41034804fdbe183c04ce63e SHA-256: 971d78127b220190ab53c692c4e0d80d5458e9def5ab771e1dd2c16262c8f924
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://laborke.ru/pbw?utm_term=how+to+play+zombies+online+with+2+players PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4452385/normal_5fe4e08926f8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466408/normal_5fdc81ec607d2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486060/normal_5ff8494c479b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456686/normal_605f69c98d4b1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499636/normal_60054f2f62ed5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497075/normal_5fcd96efc0800.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384149/normal_6057db2f7bd0b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410006/normal_5fe2a01c3566f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xedidovetaw.pbworks.com/w/file/fetch/144416892/adanga_maru_tamil_movie_download_tamilgun_hd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04aedb49-ea07-426f-9280-9fd09c6c5335/how_do_i_program_my_garage_door_opener_in_my_bmw.pdfIn PDF document text
    • http://sujagajo.pbworks.com/w/file/fetch/144487839/physical_pharmacy_mcq_questions_with_answers.pdfIn PDF document text
    • http://zewalar.pbworks.com/f/what_is_the_nutritional_value_of_beets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81a441f9-b88c-4ebf-b5e1-2b502a166ba6/10041552938.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdd11bd9-d8c9-495d-a527-75f8c127b213/23922331590.pdfIn PDF document text
    • http://wijozuzapusa.pbworks.com/f/xujigifitizesedepexi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c663174-5975-4818-9392-5c6830c5e019/canon_mx880_airprint.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16bfacbb-8d6e-42f7-bf6e-a4fdadc6af25/76643674724.pdfIn PDF document text
    • http://sorawako.pbworks.com/f/bunopoboribizi.pdfIn PDF document text
    • http://visetululiv.pbworks.com/f/advantages_of_non_probability_sampling.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aece8b9f-3a79-4820-a305-ea4bf71aa056/macbeth_patrick_stewart_free_online.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_off0000da24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA24 5536 bytes
SHA-256: faa50ae6e8e9039b57d972fe77c8eebd766cd6db2e3add6c5d1604c2f930c66f
font_01_sfnt_off0000ece6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE6 10232 bytes
SHA-256: 5118529c5e7f923308d2305bc679d7cd4ae4e9c961ede8abcbd93057a00a6192

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