Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4ec36932fc9ec47…

MALICIOUS

PDF

77.6 KB Created: 2021-03-23 03:06:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c308c780d9b2949680a61268a5c83eab SHA-1: 9b86dc51956fef61931db82da482ef33f1e55a3e SHA-256: f4ec36932fc9ec478120d0a750e3a59a640c7d5f80eb382200ee108f2eeef998
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://jumiwimov.ru/wix?keyword=ragnarok+m+apk+latest PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4368240/normal_5ff51e4d58a62.pdfIn PDF document text
    • http://pinenud.mygamesonline.org/50593816128.pdfIn PDF document text
    • http://rajukilodagoje.mygamesonline.org/puvilalema.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368976/normal_5fee4a36ee1a5.pdfIn PDF document text
    • http://wodekenizowa.getenjoyment.net/bisufipaxokiloxi.pdfIn PDF document text
    • http://jorowijedo.mywebcommunity.org/15198131474.pdfIn PDF document text
    • http://sovuradema.medianewsonline.com/nipop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476015/normal_60523022ed190.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/new_headway_plus_pre_intermediate_answer_key.pdfIn PDF document text
    • http://desovizipelo.onlinewebshop.net/28793326106.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/863a5436-7896-4ebb-803d-d6603dd9d57f/court_of_thorns_and_roses_book_1_summary.pdfIn PDF document text
    • https://9ef77391-fdd1-48d8-ba15-364b07375333.filesusr.com/ugd/ebefdf_935ad0b13fcb4fac8bb67e35a509c95a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tadevewuju/kmart_fitted_sheet_sets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53df6148-5613-481c-813e-c2ba8f08651d/what_organs_are_used_in_the_endocrine_system.pdfIn PDF document text
    • https://d451e762-8e00-4155-9971-9512d28d2528.filesusr.com/ugd/b52961_7e0b5f92c25348719b2c4c616a1ed11e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb9d109d-82be-462f-a39c-2660877bcbb4/epson_wp-4530_not_printing_black.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c1f0788-eda3-4fc9-b237-b79b384bfceb/vojixa.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/juxemoxatozeta.pdfIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/bengali_font_software.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE44 5212 bytes
SHA-256: d1837838bfe44f63406a08f7e8e9218872e0e6e80e91383d358b8be6483cf945
font_01_sfnt_off0000efef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFEF 10476 bytes
SHA-256: 8ae7482ced52159dc3c5bc6056f06eba80185b43bd66247f39f8d75243d7566e
font_02_sfnt_off000113db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113DB 16248 bytes
SHA-256: c89cd4610e7ad6cabf04f9876a36b22b5c31ae53dba02aeaa1b4677657537330

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