Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a547246684f2d37…

MALICIOUS

PDF

74.7 KB Created: 2021-03-14 01:28:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: acead344df726077fe3e0ace9999135a SHA-1: 604053478dd8c808606e11d872fe27f31119c968 SHA-256: 8a547246684f2d37dee3d632d6f618cb867f7986f70285c12e7052ce49978372
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to other PDF files, suggesting a link farm or redirection mechanism. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous embedded URLs are indicative of a malicious document designed to lead users to further compromised content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://maypoin.ru/award?keyword=advertising+creative+strategy+copy+and+design+pdf+download
    • https://cdn.sqhk.co/badaxiloru/jUWhb9n/36762898540.pdf
    • http://lebedugipul.mywebcommunity.org/56276849457.pdf
    • https://rakulemuvi.weebly.com/uploads/1/3/4/5/134506415/xafadigarazirik-vupajo-rijimotarodupof.pdf
    • https://jewelilug.weebly.com/uploads/1/3/4/3/134331877/rewiwejojaduriz.pdf
    • https://xopilujipuwoka.weebly.com/uploads/1/3/4/8/134886601/1377155.pdf
    • https://gexokatex.weebly.com/uploads/1/3/5/9/135960098/nuxan.pdf
    • http://fumexijana.getenjoyment.net/modixutazesedupegibop.pdf
    • https://paleforekirito.weebly.com/uploads/1/3/4/5/134579508/jagavu-xolifeg-kaxesozibozofam-papat.pdf
    • https://cdn.sqhk.co/fexefurif/dIGgcT1/7067314376.pdf
    • https://gojufepegaxop.weebly.com/uploads/1/3/4/3/134339744/ledetoruta.pdf
    • https://cdn.sqhk.co/gapekozuwa/eljheFu/bunedeg.pdf
    • https://pipomojum.weebly.com/uploads/1/3/4/4/134437532/5119c.pdf
    • https://nefosedinipal.weebly.com/uploads/1/3/4/6/134698739/jiputupozufoxaj.pdf
    • https://lerizizevu.weebly.com/uploads/1/3/4/3/134314130/difagozujafivos.pdf
    • https://cdn.sqhk.co/dofofigeniso/ggcijde/fundamental_definition_english.pdf
    • http://xelasurugopu.mywebcommunity.org/uses_uracil_instead_of_thymine.pdf
    • https://cdn.sqhk.co/gedugari/d9sHlgd/androidx_viewpager2_example.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fejenijovekozu/trx_beginner_workout_at_home.pdf
    • http://dovunufesesiz.onlinewebshop.net/anti_inflammatory_drugs_classification.pdf
    • https://s3.amazonaws.com/gowebabuxogiro/fractions_practice_worksheets_6th_grade.pdf
    • https://s3.amazonaws.com/dazutun/sivepizixitonozajodik.pdf
    • http://mimumugemefes.epizy.com/inverted_conditionals_exercises_with_answers.pdf
    • http://foxadawimuwewar.epizy.com/3693046290.pdf
    • https://s3.amazonaws.com/tutasujal/minecraft_bedwars_map_hypixel.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dabb.bin
3521a3c2088b83f980787182f6dff4778219bae66fa964d519049249fc7982a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDABB 5568 bytes
font_01_sfnt_off0000edde.bin
572bed20345a45ce380adfc95826ca8aa5aee3417af65d0b12b4111bed579d64		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDDE 14052 bytes

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