Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1233f0f1b10de60…

MALICIOUS

PDF

73.4 KB Created: 2021-02-13 22:41:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 43b5d40a7e0e8406652c16aec4af1f7f SHA-1: 107f0901acc9c53592ffc8b78ec467515030ae58 SHA-256: d1233f0f1b10de6027fddeed6b724ccfb35a5e9ca9b97724ced45f8d2f8cc60f
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, and ClamAV detected it as Pdf.Phishing.Trojan. The presence of embedded URLs pointing to suspicious domains like maypoin.ru and weebly.com suggests a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains keywords related to study guides, reinforcing the lure.

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://maypoin.ru/wix?keyword=lcsw+exam+study+guide+free PDF link annotation
    • https://jupawipomilat.weebly.com/uploads/1/3/2/7/132741176/2bc0e1c901cfc.pdfIn PDF document text
    • https://cdn.sqhk.co/xakawituk/RYAHCNo/nugefizu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368735/normal_5ff12fe8016c2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370266/normal_5ffe9802a308e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367300/normal_5fcea8a146a2d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461509/normal_600fe9ad24f67.pdfIn PDF document text
    • https://cdn.sqhk.co/riketumes/zDBdhig/resident_evil_7_game_download_apkpure.pdfIn PDF document text
    • https://sakobapo.weebly.com/uploads/1/3/3/9/133999770/jokiz.pdfIn PDF document text
    • https://pewaruraxifazof.weebly.com/uploads/1/3/4/3/134340131/nageroxapeja-sezepudagelixim-buxax.pdfIn PDF document text
    • https://cdn.sqhk.co/rubupidorinu/GggShga/91584973296.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/baritexovopa/21666495080.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/23627745384.pdfIn PDF document text
    • http://vezoxonu.epizy.com/40823019256.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/captain_mike_fishing_guide_galveston.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/gewejoguwu.pdfIn PDF document text
    • https://s3.amazonaws.com/gatazeromij/98840438387.pdfIn PDF document text
    • http://wanudoxemix.epizy.com/carte_du_monde_deco_grand_format.pdfIn PDF document text
    • http://kuwopugivowivo.rf.gd/88_bookkeeping_interview_questions_and_answers.pdfIn PDF document text
    • http://weloridotam.epizy.com/23624081434.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e29b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE29B 5512 bytes
SHA-256: 5950a02ebf4068648979091dbdc5e06a130cdb79421d73d727b1b09cb7cd5980
font_01_sfnt_off0000f56d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF56D 10240 bytes
SHA-256: ffce126b1b225fbd768376d2ad40adf5d9c535ea32b4ceafc166c2c0cd49e061

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