Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6e982283f523899…

MALICIOUS

PDF

84.2 KB Created: 2021-02-19 10:50:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e7950b556447e5db90686fd5c70fcdb5 SHA-1: 73aaef5bc858deeae4f20eb6739df9f7ea0839f7 SHA-256: d6e982283f52389969c3a9d7462d680c48a20e78acf450253b2e756ec3273a32
144 Risk Score

Malware Insights

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

The PDF contains multiple suspicious URLs, with one specifically highlighted as an invisible link designed to lure users into downloading a malicious file. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were extracted, the presence of deceptive links and the overall detection profile suggest a phishing attack aiming to deliver a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://druttle.ru/wix?keyword=mapleshade%2527s+vengeance+free+pdf
    • http://detonic-ordina.website/3833033365661ap5.pdf
    • https://cdn.sqhk.co/mixaluwekitu/jhawG1p/xuluruvokafojezeladivefe.pdf
    • http://lnstagram-help-businesss.com/buwezagewutesasazudifilowj8i4i.pdf
    • https://static.s123-cdn-static.com/uploads/4464080/normal_5ffcb78aeae28.pdf
    • http://bunewumokir.22web.org/netuduvatutadevoxawadonal.pdf
    • https://cdn.sqhk.co/besuduxikuvo/arhc066/bipinisutegabawekuvato.pdf
    • http://xofabusa.22web.org/arabescos_vetorizados_free.pdf
    • http://hotita.space/93680604797gz681.pdf
    • http://securitycheckingbrowservkcom.xyz/principles_of_real_estate_practice_6th_editionwto69.pdf
    • http://rentline.pro/829467249588z41j.pdf
    • https://cdn-cms.f-static.net/uploads/4447884/normal_602e1e6eeb989.pdf
    • https://cdn.sqhk.co/salobosemiv/diaidhb/fugugajalanakedor.pdf
    • http://fb-copyright-help-from.com/instructions_before_a_covid_test8ynrl.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://mojofukiw.epizy.com/ascii_test_data_format.pdf
    • http://rileponabamel.rf.gd/blood_transfusion_guidelines_ppt.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_off000101b3.bin
8f6b66f2d3c9ca996ff87e40f33597e9c5c74b8385f5a1716ed9de3537cee889		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101B3 2984 bytes
font_01_sfnt_off00010c63.bin
d879c3df77953f50689f0e3d38d5ec94c9926fb5313422dd7c45fc702f21ff21		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C63 5516 bytes
font_02_sfnt_off00011f3c.bin
7c12fca66a3c68b037cd953e2ecba4c116c2a52c1c0a6f0d2129276ea61dde87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F3C 10528 bytes

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