Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f1a580a6c00effe…

MALICIOUS

PDF

81.8 KB Created: 2021-04-29 15:58:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 774c06739deb28ee46aaf38ab94aff61 SHA-1: 70322b3a94ca06dc59b2fc61a459881c203cecc8 SHA-256: 5f1a580a6c00effe354c367a1af4d8123922d7508312ee74904f8977864094c2
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 0.9991

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://dugedepap.ru/strik?utm_term=how+to+use+blender+2.8+pdf PDF link annotation
    • http://salizurewaki.mypressonline.com/yamaha_rx_v673_manual.pdfIn PDF document text
    • https://livadasim.weebly.com/uploads/1/3/4/3/134312527/1026817.pdfIn PDF document text
    • http://risumeboze.getenjoyment.net/wawik.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408703/normal_5fc59c0138bb9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481272/normal_60287e1674090.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373520/normal_5feb09b2cb8f0.pdfIn PDF document text
    • https://zanirifut.weebly.com/uploads/1/3/1/4/131407922/papapibavizigot.pdfIn PDF document text
    • http://snapchat-alert.com/8552245127zdqbx.pdfIn PDF document text
    • http://masito.space/mists_of_avalon_tv_mini_seriesce0b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473654/normal_600d0b013cce2.pdfIn PDF document text
    • http://begemotiks.fun/war_dragons_event_calendarl3vwj.pdfIn PDF document text
    • http://naturalgood.space/best_crafting_building_games_ps4jcfrc.pdfIn PDF document text
    • http://repochka.site/rukejarejuxvbr2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1f571a09-6495-4108-bd1a-9715deae29b5.filesusr.com/ugd/b0bf26_f15b31c00b544c9ca9f8ddf723aa243d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7661c200-f520-49eb-93a6-fa0007c0c450/biblia_textual_4_edicin.pdfIn PDF document text
    • http://degevojorak.myartsonline.com/diwifuxunum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fdc2853-3ba9-4881-b339-0dd4894aef49/que_es_la_pnl_programacin_neurolingstica.pdfIn PDF document text
    • https://107a3552-ed21-4f5d-95e3-510b6eae4444.filesusr.com/ugd/21bbef_3407ba9f78a24214aaf3907739b8b538.pdf?index=trueIn PDF document text
    • https://22fea36a-5e19-4af1-b4aa-fe6e1efe0ee9.filesusr.com/ugd/b5a188_1225a7d91ad34e0a88b47a502b000cd3.pdf?index=trueIn PDF document text
    • http://sogivuwe.onlinewebshop.net/free_download_to_word_doc_converter_latest_version.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/378bb506-0117-4d1b-9c4c-c77c45760357/vikarirogijodunox.pdfIn PDF document text
    • https://994180ce-385f-4272-9833-4a204a825e0f.filesusr.com/ugd/ec0c41_4ef22ed1ec1f4d6bba5d9199416fdf0d.pdf?index=trueIn PDF document text
    • http://poborunedajemo.onlinewebshop.net/myocardial_infarction_treatment_guidelines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8448818-0cf4-44f7-9368-d00d8023ba65/84942086147.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2bc3e36-b980-4e85-964d-a48367a84cec/3134090380.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_off0000ffd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD3 5376 bytes
SHA-256: ccc9fb93a3f4dbcccb823b9e4d80aea070a88c3d20dcc18b3c674681af373433
font_01_sfnt_off0001123c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1123C 11284 bytes
SHA-256: e5694f8111bcaba822a60844b8df21610cada3200b7a35afd818b2dde5a4424b