Malicious PDF — malware analysis report

Static analysis result for SHA-256 634d2564305b03a0…

MALICIOUS

PDF

69.0 KB Created: 2020-11-19 13:12:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 1636b4e47370f0982ce3979bb0c443ac SHA-1: 1a942b25dbf0866616702c00ee31d5e4c8b545df SHA-256: 634d2564305b03a0b76bd49dc38330f9d850bc69e8a8334df0d17d36fc214763
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://trafffi.ru/strik?utm_term=exercicios+de+bissetriz+externa PDF link annotation
    • https://mawebugejememed.weebly.com/uploads/1/3/4/5/134599942/1845e7540.pdfIn PDF document text
    • https://rozemubopul.weebly.com/uploads/1/3/4/7/134719755/gudodi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421474/normal_5fafb304a3385.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366325/normal_5f9441712124f.pdfIn PDF document text
    • https://wepoduxusuduxi.weebly.com/uploads/1/3/4/3/134306179/jakepojade_luviz_bogila.pdfIn PDF document text
    • https://pafodezeba.weebly.com/uploads/1/3/4/5/134589846/moneroxulowidesex.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b0d6567-f959-41bb-b38f-454010e243f3/63787258188.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagobomap/cool_math_games_unblocked_66_google_sites.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dcd9b0e-0ad6-4bff-9446-a693af8b1d8e/dj_rap_mix_download_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tezude/gadukumugak.pdfIn PDF document text
    • https://s3.amazonaws.com/vuraradaso/algorithm_development_in_c.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72c51b9f-1b71-4aee-9e58-c8e5cbc28ab0/55985940679.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79a2bf82-dbcb-45c8-9be2-6b5f00ec5ad1/55200127457.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA9C 5116 bytes
SHA-256: a57404ac7a3e78e61bb52426f0f9f845b27abf6a3a4b393942def3286857dbf4
font_01_sfnt_off0000cc17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC17 11432 bytes
SHA-256: cffe2c99e93cd04272ac964b1882cec417c2395c1ab98d188f9f6d098e9578d9
font_02_sfnt_off0000f23a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF23A 16096 bytes
SHA-256: 3bb08857b08983a257d5a2052628e18542fd51c8d29f5bbef87ea8b8ace00841

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