Malicious PDF — malware analysis report

Static analysis result for SHA-256 15b22e01998da38e…

MALICIOUS

PDF

86.2 KB Created: 2021-02-28 06:42:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 28ae0ed0a2c0e29269174c50cde86110 SHA-1: 236dd6ad7ecf2ce4fb7c47886b38515f44dbaf1e SHA-256: 15b22e01998da38e697789873a32f9b5e60e739b03a3016d1aec51c0719687bd
156 Risk Score

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://kuzutuzo.ru/aws?utm_term=how+to+install+power+vent+on+rheem+water+heater PDF link annotation
    • https://poxatekegevu.weebly.com/uploads/1/3/4/7/134753674/7460127.pdfIn PDF document text
    • https://dizegovonaziluz.weebly.com/uploads/1/3/4/8/134881707/damikebep-megisukid-popaf.pdfIn PDF document text
    • https://dirogine.weebly.com/uploads/1/3/0/7/130775503/76c91a83.pdfIn PDF document text
    • https://pezebojikunebal.weebly.com/uploads/1/3/4/3/134362674/duselevi-gonirataposose-mogagigepovol.pdfIn PDF document text
    • https://gidedumewulo.weebly.com/uploads/1/3/5/9/135961218/240db8.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/sevoga/counter_strike_1._6_online_hack.pdfIn PDF document text
    • https://s3.amazonaws.com/tiniruru/lonigubow.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/lebemafonalad.pdfIn PDF document text
    • https://s3.amazonaws.com/zebarufuridorur/davop.pdfIn PDF document text
    • https://s3.amazonaws.com/pukiza/baciloscopia_positiva.pdfIn PDF document text
    • http://gabifuzof.rf.gd/attacco_dei_giganti_manga.pdfIn PDF document text
    • http://dizavinizekabos.rf.gd/how_to_get_lint_out_of_dryer_trap.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/voxuxunimuduzefozipame.pdfIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/72984522771.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/cooking_vocabulary_worksheets.pdfIn PDF document text
    • http://zumaruzafomadik.rf.gd/mekivot.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/69703966295.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000112fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112FA 5172 bytes
SHA-256: cfb9af116fd2ba23f82088dc0b2291ba5a0c613e714a11f83fa176d9daf63ef4
font_01_sfnt_off0001247a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1247A 11404 bytes
SHA-256: a288266a3760016d6978d7e481c7e730f428bcfbe829526f5a918214de1b9c54

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