Malicious PDF — malware analysis report

Static analysis result for SHA-256 c065faa07be8e078…

MALICIOUS

PDF

78.6 KB Created: 2021-04-01 02:41:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 140a1ac3fb83a49330bf7ca83f66458e SHA-1: c6c35d6f0b5a704044b4641d263d770a11d689cc SHA-256: c065faa07be8e078c3f49518feae5bfa3a5356b5e321465636ea232df4dc3e12
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by heuristics as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/award?keyword=asme+code+case+2901+pdf PDF link annotation
    • https://cdn.sqhk.co/mixaluwekitu/heSgjwg/jurassic_world_map_minecraft_download.pdfIn PDF document text
    • http://stnold.com/what_is_a_good_sat_math_score_for_engineering2clq6.pdfIn PDF document text
    • https://cdn.sqhk.co/rufopunuk/hcWjoky/84092161239.pdfIn PDF document text
    • https://cdn.sqhk.co/xubupigegi/e4gdjdr/american_fighter_planes_of_world_war_2.pdfIn PDF document text
    • http://5dradio.ru/ernest_hemingway_list_of_books_in_order8bs1b.pdfIn PDF document text
    • http://lowabunuzoxa.getenjoyment.net/fegazumekagasumeburusir.pdfIn PDF document text
    • http://gikodarekegov.mywebcommunity.org/latex_beamer_includegraphics.pdfIn PDF document text
    • http://guzoseta.getenjoyment.net/serato_dj_lite_mac.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://s3.amazonaws.com/vapite/52740117860.pdfIn PDF document text
    • https://s3.amazonaws.com/puretulenuza/boderigozig.pdfIn PDF document text
    • https://a44a9d9e-3ce9-422e-9b5d-83ef2d4925cb.filesusr.com/ugd/3234e9_a74771f4cc6f4c7b97131c272fe20644.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7424a32e-50d7-4952-b9a7-b133c174d123/jenosupazuraxalokomipeb.pdfIn PDF document text
    • https://a2c67b61-a01d-4053-b7ad-f1487bca8054.filesusr.com/ugd/24853a_20ba0d68d6594b6e9d32528f96af4063.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1fbae13-9260-4759-8b2a-758b6a619586/saxatud.pdfIn PDF document text
    • http://kogotiru.myartsonline.com/17079270350.pdfIn PDF document text
    • https://a5a8f6e1-24ae-425c-880d-6f4079e3c376.filesusr.com/ugd/035627_3348b921af7e43d785de54d9c1fb4341.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kewuxejikiwe/11208750562.pdfIn PDF document text
    • https://s3.amazonaws.com/lopeteb/34568350677.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E6 5200 bytes
SHA-256: d6a66ff3e7365eec2307dcb58e284a7deaf2aacfda23fff499286d22cd218e0b
font_01_sfnt_off0000f988.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF988 11004 bytes
SHA-256: 0ad64a30f57e54e8404ffcc6868056e5880117016aeab0406be0bb502211be8d
font_02_sfnt_off00011f29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F29 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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