Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6e589ed96a44802…

MALICIOUS

PDF

75.3 KB Created: 2021-06-06 01:29:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5ba963c3d7652bf30daf9a460d2b487d SHA-1: 72b23626dfcbf00b79ece57eacdd105e7eec9919 SHA-256: e6e589ed96a448021e928b4887949b3c7d946498245e94480c4443e795a7f367
126 Risk Score

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 0.9995

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://ketchas.ru/pbw?utm_term=o+mundo+como+vontade+e+representa%25C3%25A7%25C3%25A3o+tomo+1+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388617/normal_60135fd142b33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416302/normal_6060585f10e7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386595/normal_5fdc5129c865a.pdfIn PDF document text
    • https://kokuxokuge.weebly.com/uploads/1/3/4/7/134771281/4167372.pdfIn PDF document text
    • https://sejirefado.weebly.com/uploads/1/3/4/6/134682993/tatowusikuze_vojetave_tefusibi_towuxetijul.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365656/normal_600692e12000f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387219/normal_604021af8e227.pdfIn PDF document text
    • https://luwagibefex.weebly.com/uploads/1/3/5/9/135966535/5609855.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416514/normal_6002e4b5b90fc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388279/normal_5ff9255e62169.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459477/normal_6025de62049f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378831/normal_60468cf8e7ec5.pdfIn PDF document text
    • https://dukupifit.weebly.com/uploads/1/3/0/7/130775427/gibalun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426066/normal_60598e3527e5b.pdfIn PDF document text
    • https://xufodikufidu.weebly.com/uploads/1/3/5/3/135382923/4554062.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/5afab9c0-9360-4f03-b809-cd0e79eb4ae1/how_to_know_if_dirt_bike_is_running_lean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8a40969-e23c-4040-9667-c4853a88a626/thomas_calculus_12th_edition_early_transcendentals_solution_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/609d1ff3-4616-4e2a-9dbf-f9366631857c/24910179362.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd6b6df0-cf57-44df-bb9f-3e2bdc49d5c4/jitasafufinisigujo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/692b5fe3-6a49-4ebd-9078-0c41316f3e4b/how_to_improve_stamina_for_soccer_running_1600m.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb1c58f4-f04f-47c8-9b09-7e81513c61ed/maxi_cosi_car_seat_replacement_strap_pads.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eca77d5b-9f44-4b3c-9fa0-1501d02f48c0/how_to_replace_jandy_aquapure_1400_cell.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_off0000e025.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE025 5908 bytes
SHA-256: 69d9d61d43662a26beb2fca0c15811e8ca35f388d1956c1491ae28af12f9bd48
font_01_sfnt_off0000f354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF354 13752 bytes
SHA-256: f8ec3ffd23a43cfca06839df776f161cb8869792f2b219b548c48da72e5a6b06