Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f1dda2048b9e587…

MALICIOUS

PDF

78.0 KB Created: 2021-04-01 21:06:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d726ab06594f4994c6b0e8439ff8963 SHA-1: 90b9c8e5749f13099a003dcc751be7a782f08f9c SHA-256: 0f1dda2048b9e5870f773c595569090a78db5e64726386568a6c657ffba7d7e9
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is a common tactic for phishing or malware distribution. ClamAV detection and ML classification strongly indicate malicious intent. The document body, though heavily obfuscated, suggests a lure related to an essay, likely to trick users into visiting the external URL.

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://vilenefex.ru/wix?keyword=a+raisin+in+the+sun+essay+about+walter
    • https://cdn-cms.f-static.net/uploads/4368474/normal_60420e88511ac.pdf
    • http://my-favshopg.online/legend_of_the_boneknapper_dragon_fuljkuag.pdf
    • https://cdn-cms.f-static.net/uploads/4366665/normal_603c2726ad7bb.pdf
    • https://woxavadegiw.weebly.com/uploads/1/3/4/9/134902916/satowu.pdf
    • http://libralab.digital/482130111406p108.pdf
    • https://cdn-cms.f-static.net/uploads/4420459/normal_5fd31f4dd935f.pdf
    • https://goguribepolim.weebly.com/uploads/1/3/0/7/130739596/vuvunexenakid-puzofezefot.pdf
    • http://lnstagramsecurity.net/zimsec_o_level_biology_notesfcs5n.pdf
    • http://espaceabonne.com/problemas_estequiometria_4_eso_resueltos5q512.pdf
    • http://wersita.space/lefutikn2fq7.pdf
    • https://lupexepiw.weebly.com/uploads/1/3/4/3/134318885/tikexugov-pigewiwox-jipin-xiduveke.pdf
    • https://cdn-cms.f-static.net/uploads/4365601/normal_604e535e17dd8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://buzatagijekoj.rf.gd/bioshock_rapture_libro_espaol_descargar.pdf
    • http://bepuvebawufik.epizy.com/merafalodukumi.pdf
    • http://negorox.epizy.com/gonejevog.pdf
    • http://kuxexulotubi.epizy.com/atmosphere_brush_font.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_off0000f584.bin
3c5329204c53098c07fca46a279479490c9253c15dc188abd54ad05dbde70169		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF584 5096 bytes
font_01_sfnt_off000106e7.bin
85cce39dfab12dbb60e72544f8662efceb89ce23dd1c7121ced1278d17f1e16f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106E7 10532 bytes

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