Malicious PDF — malware analysis report

Static analysis result for SHA-256 844718123cc0a568…

MALICIOUS

PDF

75.9 KB Created: 2020-11-10 18:56:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: e25eaffcfd0f425a259351f9fcdc00fa SHA-1: d46e9d6f69267c775b4a555e7cb251249df421b6 SHA-256: 844718123cc0a5681422ea0a3fcbaccf302707a9770f5f21eb6ba9d2fe21065b
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://trafffe.ru/123?keyword=plusone+solutions+screenings PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393220/normal_5f8f77e6b6eed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474998/normal_5fa7d44469f42.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366024/normal_5f8b4ae8da345.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462036/normal_5fa4802bf0c1a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424328/normal_5fa872b5349de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383149/normal_5f8ec1a5be3ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365589/normal_5f870511e2d0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369936/normal_5f88ebbe23a35.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/wilugugo/math_tricks_book_in_hindi_download.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/fibipifukenowenowu.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/rca_video_y_cable.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/malayalam_calendar_2018_october.pdfIn PDF document text
    • https://s3.amazonaws.com/tamobalasu/xevukefofinevatajow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d88566fd-2f6e-4abc-8164-5ca38bb4cdda/md_new_hire.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/rupijupodokewub.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000daf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAF3 6872 bytes
SHA-256: bdeee27b6f3fdebd23c80054e871120672e89c494bfae03318cdcbf718eb61ef
font_01_sfnt_off0000ec4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC4A 4756 bytes
SHA-256: b0af665bb40e797c0f31a98659722497c50216db34d229f428fd44bc72a02523
font_02_sfnt_off0000fc8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC8E 11128 bytes
SHA-256: 0e6974c76ac6e24b5eb8c267b05c6f21f08510473e3043ba22d36ff03978a0a9

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