Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaeebd76a37f0cb3…

MALICIOUS

PDF

77.4 KB Created: 2021-03-04 14:09:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 14ec4e9c05fe940893ad14edf4fc76e2 SHA-1: ae949bca959b29685b1ad54d9283ba83c65a40c4 SHA-256: aaeebd76a37f0cb3ab951b00ac35ea6a43ad76b2dae31fb8b1300dc6e000825b
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a link farm. The primary malicious URL, 'https://botokaw.ru/strik?utm_term=roosa+master+db+injection+pump+diagram', suggests a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or distributing a trojan.

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://botokaw.ru/strik?utm_term=roosa+master+db+injection+pump+diagram PDF link annotation
    • https://puvugopusu.weebly.com/uploads/1/3/2/7/132711965/zarekogotimikaf.pdfIn PDF document text
    • https://jafekubu.weebly.com/uploads/1/3/0/8/130814731/8a3b027dfc6.pdfIn PDF document text
    • https://zolotamazuragif.weebly.com/uploads/1/3/2/7/132712333/fixikugelog.pdfIn PDF document text
    • http://slmit.fun/bisexomenatimokorexlh7gz.pdfIn PDF document text
    • https://bobifadilow.weebly.com/uploads/1/3/5/2/135295989/valeru_famuxupijor.pdfIn PDF document text
    • http://select-get.top/kojuvibokesodikaxalg5xr.pdfIn PDF document text
    • https://sadewurepoko.weebly.com/uploads/1/3/0/7/130776460/45e797ad2c93c.pdfIn PDF document text
    • https://rikekipodoze.weebly.com/uploads/1/3/0/7/130776447/3ccd7e7f1.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/mefonevimimix/74223333793.pdfIn PDF document text
    • https://s3.amazonaws.com/furunumaroxun/aplikasi_anonymous_hack_facebook_di_android.pdfIn PDF document text
    • https://s3.amazonaws.com/kotenu/verizon_job_fit_test_a_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/gudukupir/external_style_sheet_css_w3schools.pdfIn PDF document text
    • https://ebba3e40-d49f-4cc8-b137-373bb1124918.filesusr.com/ugd/384ea4_485294f0b75146fab60e56495bab9822.pdf?index=trueIn PDF document text
    • https://76df98a8-3e94-4eee-a6f5-23e1de06049b.filesusr.com/ugd/54c74c_8616e84555f24d3e9814f963b0169573.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jinabisura/livuxodeke.pdfIn PDF document text
    • https://8d5bcf17-53f2-4f21-b585-7a27aef14131.filesusr.com/ugd/7baf93_576a2dd603f0417fbdc7450dfbaa3ba2.pdf?index=trueIn PDF document text
    • https://a7563df4-ba19-4d82-a8a0-b2470d957038.filesusr.com/ugd/61f964_1a6249714d464833b409eda2ac1f2b29.pdf?index=trueIn PDF document text
    • https://4f0754e2-f0c4-47db-826b-83042027646c.filesusr.com/ugd/7a11b0_591ef6d498ef4c94a97f6bc6781a5d5e.pdf?index=trueIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC8 5584 bytes
SHA-256: 7ae48528e23b73ae81d105e929774c2f10ec740365b23673a72bfc526dbc4469
font_01_sfnt_off0000ffb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB4 12580 bytes
SHA-256: 7853421520582b4a387f949ef53ae9851881b85b610712acea259acef1254ee4

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