Malicious PDF — malware analysis report

Static analysis result for SHA-256 725968e253dc1137…

MALICIOUS

PDF

95.3 KB Created: 2021-04-17 13:41:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 8bcca53d0e87853e956d79ef0e2abe5b SHA-1: 50e1ae3d05772b066de0f3552693b685aa12d74a SHA-256: 725968e253dc1137515f9a6342d76d489f5bb528840b0617b86cc2bfd408308f
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains an embedded URL that masquerades as a literary analysis essay, likely to trick the user into visiting a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to lead the user to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jumiwimov.ru/strik?utm_term=literary+analysis+essay+on+the+great+gatsby PDF link annotation
    • https://cdn.sqhk.co/pixazizaze/icw9hj4/55567933739.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/kijchgo/visolonos.pdfIn PDF document text
    • https://cdn.sqhk.co/kolazapikib/hFtibjc/40768252090.pdfIn PDF document text
    • https://cdn.sqhk.co/jevipugirofi/jcCgehc/avg_2018_free_for_pc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405443/normal_60473a4b41ae7.pdfIn PDF document text
    • https://cdn.sqhk.co/vumusokutil/jjBbhgq/new_nightbringer_and_dawnbringer_skins.pdfIn PDF document text
    • http://nunovoxiwanafuz.getenjoyment.net/katefir.pdfIn PDF document text
    • http://gelupulofevabek.medianewsonline.com/xoxidugolerinodulari.pdfIn PDF document text
    • https://cdn.sqhk.co/rajunakeb/hbjiZYd/31766188332.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452851/normal_5fd0d41a5b37b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370264/normal_600cdea0e7c2a.pdfIn PDF document text
    • https://cdn.sqhk.co/filemowa/gxjdjdJ/bidesog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445130/normal_6009f7fe2ed2a.pdfIn PDF document text
    • https://cdn.sqhk.co/zezolivexas/bhapjft/siwowazojugomusepediwo.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/8298fac2-9018-44f1-9713-89b51b5accea/30995283050.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e5cabca-0675-4bba-98fb-a4436adb6548/pathfinder_kingmaker_portraits_folder_steam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22a574bc-2ed2-445d-8ea2-f3a1e730aa41/clergy_housing_allowance_worksheet_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/rovuweraja/bivabo.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/cat_s_cradle_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/lejajibejowanuwep.pdfIn PDF document text
    • https://s3.amazonaws.com/ligole/nexajobur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf3c7588-1331-4abe-927d-fbedb7da6f5e/38664032181.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_off000139e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139E7 5132 bytes
SHA-256: 9d720a9a92e8a445b6655057fc21085a18523dc501872eade8afc05f807da203
font_01_sfnt_off00014b5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B5D 10604 bytes
SHA-256: c032aa3884edeaf99b5c913344a553ed2319cf018ea080bd2b2ed80b22a5f25a

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