Malicious PDF — malware analysis report

Static analysis result for SHA-256 bde3e2de307eea61…

MALICIOUS

PDF

82.2 KB Created: 2020-12-19 23:18:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d4b1a2b4c9cb6d76657a50232d6f2615 SHA-1: 1fdf4ea61b49449983ca951df8bb2d3ee1853f48 SHA-256: bde3e2de307eea6126494720bbbc14ff5f04e62c86e9bbac1da463f4c5a0bc8d
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for link farms and phishing. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as a phishing trojan. The embedded URL 'https://traffking.ru/aws?utm_term=super+mario+bros+theme+piano+sheet+music' suggests a lure related to sheet music to drive traffic to a malicious domain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffking.ru/aws?utm_term=super+mario+bros+theme+piano+sheet+music
    • https://cdn-cms.f-static.net/uploads/4365594/normal_5f890a3e9d945.pdf
    • https://dubuzosokiboxof.weebly.com/uploads/1/3/1/1/131163723/marupo_marezotexip.pdf
    • https://cdn-cms.f-static.net/uploads/4370273/normal_5fc22be5b0cbe.pdf
    • https://pizipeko.weebly.com/uploads/1/3/4/6/134611096/92a1f0b4cf6.pdf
    • https://supavutoni.weebly.com/uploads/1/3/4/7/134713891/depura_dorobukuvefo_riwod_ramuluxi.pdf
    • https://lizotolagodega.weebly.com/uploads/1/3/4/4/134495854/236792.pdf
    • https://cdn-cms.f-static.net/uploads/4365606/normal_5f87bbcedff82.pdf
    • https://cdn-cms.f-static.net/uploads/4370074/normal_5f889f2d784c2.pdf
    • https://vawavujak.weebly.com/uploads/1/3/4/3/134350312/pixirunorujalenes.pdf
    • https://xepajozojiv.weebly.com/uploads/1/3/4/4/134476610/pesenel_xibogijokuneduw.pdf
    • https://nigiseza.weebly.com/uploads/1/3/4/4/134462574/6736465.pdf
    • https://cdn-cms.f-static.net/uploads/4403283/normal_5fa492b86e6d4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/nerugiraxura/epi_test_max_ingredients.pdf
    • https://s3.amazonaws.com/rerinago/roraladadudigu.pdf
    • https://s3.amazonaws.com/pasawe/editorsdepot._com_for_free_templates.pdf
    • https://s3.amazonaws.com/saziwijaxodav/tatalaksana_atresia_ani.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f02b.bin
8f68a524cd93ee7671e0a9ed24a0c5ac095c713f73db47ae29d2acf04d20a069		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF02B 5384 bytes
font_01_sfnt_off00010244.bin
4e2b5a2e33391494e89e265fec06c0e494b19f6900bc1f1e58075664f965eab0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10244 10508 bytes
font_02_sfnt_off00012650.bin
d973db94ba2c448c661c26f08d051ac794e7cb4f3c7daa33c2141e8036f071b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12650 16100 bytes

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