Malicious PDF — malware analysis report

Static analysis result for SHA-256 711ef1d9f7485456…

MALICIOUS

PDF

138.3 KB Created: 2021-03-16 00:48:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9bd4a561f407de1e56792ecc21654188 SHA-1: b81c6be1ddfb216a6d15e597f2b4006744793088 SHA-256: 711ef1d9f74854562fa00e9b20ac21c2d956b765ffa63afba2ed9a4a4cf39598
216 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics, including ML classification and ClamAV, as malicious. The 'SE_SECRET_RECOVERY_LURE' heuristic indicates the document's intent is to trick users into revealing sensitive recovery information. The presence of numerous external links, many pointing to PDF files, suggests a phishing or credential harvesting campaign. No scripts were extracted, but the document's structure and embedded links are indicative of a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

Heuristics 6

  • 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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://dafemum.ru/wix?keyword=uo+taming+guide+stratics
    • https://fukuzodi.weebly.com/uploads/1/3/5/3/135329923/7042432.pdf
    • http://madewithsunshine.com/worasuzewobojupusizamigo0qx.pdf
    • http://drnextact.xyz/63426439909a3vbw.pdf
    • http://vezerfa.xyz/zatizidejuhi.pdf
    • https://durirumis.weebly.com/uploads/1/3/3/9/133999752/1418572.pdf
    • http://instapresent.site/ayo_and_teo_reverse_freekg6l3.pdf
    • https://lafevisok.weebly.com/uploads/1/3/2/6/132683062/8230ac2c4.pdf
    • https://dowogejur.weebly.com/uploads/1/3/5/9/135992185/ced36730d354eeb.pdf
    • http://cadenalia.com/pestel_analysis_templateski5ol.pdf
    • http://promooffer.site/91084296412euvae.pdf
    • http://salearea.pro/91149499508bvxls.pdf
    • http://mebel-albero.ru/balivimewivrge0d.pdf
    • http://testersairf.xyz/game_controller_for_sony_android_tvsc8sc.pdf
    • https://fivalukovegobag.weebly.com/uploads/1/3/4/6/134693255/dowux.pdf
    • https://radojevujexoki.weebly.com/uploads/1/3/1/8/131871685/sotoxaje-zeletibizo-murimunukov.pdf
    • https://limulepaxot.weebly.com/uploads/1/3/1/3/131379958/71d6f8f8de2e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://18aefb47-0221-41c7-ace0-4f78eb33e730.filesusr.com/ugd/bca722_df72a1c6364f4a78a87b4bbf0514e626.pdf?index=true
    • https://3e1af3dc-cf37-4f58-935d-0a6065bc5ce9.filesusr.com/ugd/3ca236_0c797bd836804fd1a32da6dd9fcb9f79.pdf?index=true
    • https://s3.amazonaws.com/wifukedot/89412465204.pdf
    • https://4bc473c2-84d0-4913-8b4e-281bf44fba2e.filesusr.com/ugd/a25dbd_aec943a384084f08b0e13b20062b8b48.pdf?index=true
    • https://35e1cc1d-5f6c-4a41-9b1b-b9ae8dddc97a.filesusr.com/ugd/351eee_0a469d8e55d24f528fe9964cca0e8064.pdf?index=true
    • https://s3.amazonaws.com/gumegulaxi/16936108448.pdf
    • https://s3.amazonaws.com/zemigiduwagafu/68158222101.pdf
    • https://s3.amazonaws.com/fakuguvil/tuzizikakanavu.pdf
    • https://3fb740b9-71d8-4183-8edb-de11b68c0a29.filesusr.com/ugd/1fbf8b_56a4721ee5e24f46a3354c13513c4a7a.pdf?index=true
    • https://s3.amazonaws.com/jenagubadopi/how_to_rebuild_milwaukee_m18_battery.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013c98.bin
e941fa9d6ee4c8b936021f148639aca02fa06181ef94907ffb65ac1ee21bedef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13C98 50672 bytes
font_01_sfnt_off0001d66f.bin
cf1f8354afce0b619febdad45bc24723213e0b25bebc73ca9fc1ef4cae496069		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1D66F 5216 bytes
font_02_sfnt_off0001e811.bin
e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1E811 1800 bytes
font_03_sfnt_off0001f09f.bin
2fde45aef5ba806729ed9203db6e0a5f2e7c0f752566237fcc375eee476356e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1F09F 11600 bytes

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