Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0e4c2d98cb78cce…

MALICIOUS

PDF

77.6 KB Created: 2020-11-26 04:30:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: c793abdf58e1cd1b40953b82222ebde2 SHA-1: 1e83abc137f8d67678b194b9ed35ec0556952f58 SHA-256: c0e4c2d98cb78cce45ef8ef47a26335b76bcf6e9d0a5bc2777df6494af8c4be6
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffnew.ru/123?utm_term=foxy+the+pirate+one+piece PDF link annotation
    • https://jaketomerinojox.weebly.com/uploads/1/3/4/1/134109184/927c1867.pdfIn PDF document text
    • https://bilobusi.weebly.com/uploads/1/3/4/8/134872308/9284383.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383450/normal_5fa5c31fbe110.pdfIn PDF document text
    • https://nubazodakop.weebly.com/uploads/1/3/4/8/134850303/4108808.pdfIn PDF document text
    • https://nurobajaxi.weebly.com/uploads/1/3/4/5/134507542/ff64416607ab7e.pdfIn PDF document text
    • https://voziguwotameba.weebly.com/uploads/1/3/4/3/134345279/visokumevu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/devuxuzejozam/everquest_spell_research_leveling_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/family_and_friends_4_workbook_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/perurulexi/64009889342.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/riesgo_de_mercado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d0a3aff-d4e8-49f0-8d3b-2645c1744f11/xikafuvo.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/506_assignment_answer_in_english_free_download.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c9a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9A4 4936 bytes
SHA-256: 245cdabf953643bfcf45b4b8311ff91cd63dc01e8b3a7f36b737b71c68ccd5b9
font_01_sfnt_off0000da72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA72 5132 bytes
SHA-256: dc9588753c3e6303d6d41b2214cc7e94a746247fd50bdcd35b591d66b59fcef6
font_02_sfnt_off0000eae1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE1 12264 bytes
SHA-256: 0f3b6551bb4ea34f4ac2701e1dea2cc4906219c559115fceae1139d087586f0e
font_03_sfnt_off00011436.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11436 16100 bytes
SHA-256: 26b31ba2131ae2f7da025a7fda5e9dcfe79fc1d25f6641dd8c13613e564b4b69

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