Malicious PDF — malware analysis report

Static analysis result for SHA-256 10484d09f8ca1443…

MALICIOUS

PDF

71.9 KB Created: 2021-03-19 09:31:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 63269ecd76db780918479f0dba560b44 SHA-1: d94a721fc87c92920ec608cbbc8fc86711ac6540 SHA-256: 10484d09f8ca1443756cad43d50f60e1f3535a0696dfdf00b43c2903a715955f
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a critical heuristic firing for ClamAV detection. It contains an embedded URL pointing to a suspicious domain, likely intended for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, potentially exploiting PDF vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/wix?keyword=conic+sections+pdf+for+iit+jee
    • https://cdn-cms.f-static.net/uploads/4473618/normal_602f24e788678.pdf
    • http://fanisore.sportsontheweb.net/sonamovizorudazetejokefeb.pdf
    • http://nepoxiduvilej.scienceontheweb.net/free_download_adobe_reader.pdf
    • http://wonodeme.22web.org/thermodynamic_equation_of_state.pdf
    • https://static.s123-cdn-static.com/uploads/4486523/normal_5fffea1bcb2a3.pdf
    • http://xuvaxujogilo.mygamesonline.org/99244871150.pdf
    • https://cdn-cms.f-static.net/uploads/4492245/normal_6043dc99214de.pdf
    • https://zegekeli.weebly.com/uploads/1/3/4/6/134616407/be1c5695f.pdf
    • https://static.s123-cdn-static.com/uploads/4380078/normal_5ffbd0aec9804.pdf
    • https://static.s123-cdn-static.com/uploads/4366399/normal_5ff9954fa72bd.pdf
    • https://likizosuzi.weebly.com/uploads/1/3/4/8/134886942/mefaxojizogemekevija.pdf
    • https://xisevulatunetu.weebly.com/uploads/1/3/4/5/134595014/38d3d6a9a8e98fd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/837feefe-66d2-47aa-be70-b77a81c02c8e/how_to_write_a_good_reflective_essay_examples.pdf
    • https://6632aaff-1fe9-4f1d-acb3-7d444e457837.filesusr.com/ugd/ce4b7c_c4502545a1874b14974f1fab9e63cc09.pdf?index=true
    • http://widafasamuj.epizy.com/66325466418.pdf
    • https://uploads.strikinglycdn.com/files/c48aacdc-0472-4ce3-9cc3-e0caba7bf471/vedajexuvuberuvivolesaz.pdf
    • http://forojiwimudobo.atwebpages.com/51280116623.pdf
    • http://godubaxedija.rf.gd/bosufageso.pdf
    • https://uploads.strikinglycdn.com/files/1e2ee159-7c08-4723-8e09-7540168d92dc/duzilerexorigi.pdf
    • https://b56e00ce-d729-42e9-814b-b9a4b194f5ba.filesusr.com/ugd/f6f93f_7d3ad094fb074c259b3b281aeb328255.pdf?index=true
    • http://bisegigosos.epizy.com/9221890823.pdf
    • http://sidigoxe.rf.gd/dejibaki.pdf
    • http://nuwadolonopip.onlinewebshop.net/automation_anywhere_tool_tutorial.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d146.bin
61921054aa2d267f4e40de364747ae30958e2c288da4610a4c42078804ff73c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD146 4792 bytes
font_01_sfnt_off0000e19f.bin
a4ddd5641286de19b4647c133ae3703abd1a8482a58bc6f0610e22f751130fda		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE19F 9872 bytes
font_02_sfnt_off00010388.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10388 4324 bytes

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