Malicious PDF — malware analysis report

Static analysis result for SHA-256 76e39c66be551ab1…

MALICIOUS

PDF

74.6 KB Created: 2020-12-17 12:40:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e39be895d75dc1be1b056a11274f69ed SHA-1: 2ff4093b060318ad5177229df4d18317cd9b9d40 SHA-256: 76e39c66be551ab1435fba20fd63e56bdd1d2c276b6275f8193e81b9c154b38a
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ML_NYX_PDF_MALICIOUS and CLAMAV_DETECTION heuristics confirm its malicious nature. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/strik?utm_term=technology+rocks+seriously+balance+scale
    • https://wujipiledulom.weebly.com/uploads/1/3/4/6/134695719/rigugu.pdf
    • https://vazoxavaver.weebly.com/uploads/1/3/4/8/134863882/ad6ff7f7d7c9.pdf
    • https://jokiwaxe.weebly.com/uploads/1/3/2/7/132740814/06be284ebc0.pdf
    • https://rewemekekebaz.weebly.com/uploads/1/3/1/4/131406535/c1fb6a0c05ba3.pdf
    • https://bavexopifepixab.weebly.com/uploads/1/3/4/6/134683122/jadewulidesazapot.pdf
    • https://static.s123-cdn-static.com/uploads/4454821/normal_5fc5e1ec939f1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fc3690c2e537a05ef19187d/t/5fc7069aad3e6411923bffbc/1606878876130/binesonazukakupem.pdf
    • https://s3.amazonaws.com/fadadedezeker/1052234419.pdf
    • https://static1.squarespace.com/static/5fc534d7be9b693951270167/t/5fc8ee9b9d58744bc8a40435/1607003806106/the_floor_is_lava_game_instructions.pdf
    • https://s3.amazonaws.com/fofeguj/conduction_convection_radiation_worksheets_7th_grade.pdf
    • https://s3.amazonaws.com/saziwijaxodav/24489491108.pdf
    • https://static1.squarespace.com/static/5fc36ab50b6b03258f456e50/t/5fca40ed52b5874c859c4f22/1607090414553/wufixiboju.pdf
    • https://static1.squarespace.com/static/5fc2b498e9fc3622d52dc1d8/t/5fc79225e2dcb1274df35d94/1606914598940/photo_editor_for_pc_free_download_windows_xp.pdf
    • https://s3.amazonaws.com/bezorito/busy_bees_nursery_eastbourne_ofsted_report.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_off0000cf64.bin
75dcc789f5913bac67b9eed07f7fe66955db4d3a3829ea304fcebe7ce746cab1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF64 5316 bytes
font_01_sfnt_off0000e17e.bin
f1bb8da83d99a7082b7a23220b0a2c3f7c3998800d0f5657668bc1a2ee2eacde		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE17E 10972 bytes
font_02_sfnt_off0001071b.bin
8cc6bcc2cf3defe0a88aedbd81e1c3d6ddceaf294630c8a268e5b6d92b2eedfb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1071B 16256 bytes

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