Malicious PDF — malware analysis report

Static analysis result for SHA-256 49c3850c36c3dd1d…

MALICIOUS

PDF

77.6 KB Created: 2020-12-22 04:17:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 2c437270da2a020364e391e61ca31a8f SHA-1: da73dc7ede13a4089d1c14c7321150d2d7e917f1 SHA-256: 49c3850c36c3dd1d38cb94538d24e600f94f097392674aa99e11ce78c8d457d3
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 0.9998

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 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/strik?utm_term=nickelodeon+time+capsule+location PDF link annotation
    • https://vajoribenokajug.weebly.com/uploads/1/3/4/7/134713142/8051044.pdfIn PDF document text
    • https://fategebedabeno.weebly.com/uploads/1/3/4/7/134718848/085e8efba9fb565.pdfIn PDF document text
    • https://nogafuku.weebly.com/uploads/1/3/2/8/132815296/luvavedefafa.pdfIn PDF document text
    • https://xoselupovogim.weebly.com/uploads/1/3/4/6/134610719/gofazixa_gizitubosesobim_xogemuselobaja.pdfIn PDF document text
    • https://dobaviwipiz.weebly.com/uploads/1/3/4/7/134766835/a64abf3.pdfIn PDF document text
    • https://gelekale.weebly.com/uploads/1/3/4/2/134266195/5434bdd0b.pdfIn PDF document text
    • https://juboxunogaruf.weebly.com/uploads/1/3/4/7/134700559/jamidavafepep.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/zepifudoxapo/75433887447.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/real_estate_investing_partnership_agreement.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/ependymoma_pathology_report.pdfIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/download_anglicanism.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fe02eeaff074777c986978b/t/5fe0d517bd1b9d40575421e6/1608570136063/vajalasavon.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/49735945983.pdfIn PDF document text
    • https://s3.amazonaws.com/safago/ben_10_heroes_mod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e9ae7bf-ec81-42c7-993d-aaf358a8f15f/24895231800.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1a8581b-10fc-4f43-8d1e-b816be0e0561/better_vampire_weapons_skyrim_se.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_off0000e481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE481 5036 bytes
SHA-256: 5c27cac6b43cfbbcf76230b994e4d9b345952446082cb7b6717ac271837fc52a
font_01_sfnt_off0000f57c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF57C 11080 bytes
SHA-256: 6cbabe68560b42fd0fff165b3b371deff8b1a4c9d8477785bd1cdd36489e9754
font_02_sfnt_off00011b5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B5A 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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