Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f23fa01678ad4f6…

MALICIOUS

PDF

83.4 KB Created: 2021-03-30 10:58:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d475987a077c2c44b0bef7c2d3c8773b SHA-1: b760c7fec11d85cf8d81f4c57f928f302dd508ec SHA-256: 6f23fa01678ad4f6f10247cee8eeb3f1a6d7daea042d5afe22995aeca4d9023c
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, identified as malicious by ML classifiers and ClamAV. The document body, though heavily obfuscated, contains text related to 'cancer de pulmon', suggesting a lure to trick users into visiting the malicious URL. No scripts were extracted, but the presence of external URIs and the overall detection by security tools indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://midufefew.ru/award?keyword=cancer+de+pulmon+definicion+pdf
    • http://martakkord.ru/gukujazapifu2owp7.pdf
    • https://rexawalifutox.weebly.com/uploads/1/3/4/4/134458468/40eca58760a.pdf
    • https://tasusigogifu.weebly.com/uploads/1/3/5/3/135303518/4838129.pdf
    • http://kernig.pro/1529215656561ccf.pdf
    • http://tehnotop.store/junobiwawukumoxokelebatvds6u.pdf
    • http://fullpisetc.ru/computer_guide_for_beginners_free_download41po3.pdf
    • http://fb-copyright-help-from.com/why_cant_i_see_the_street_view_on_google_mapsbr37r.pdf
    • http://fitokaps.xyz/batufuvizopuvilanesy00r.pdf
    • https://bavifevip.weebly.com/uploads/1/3/6/0/136049805/a5932b552e475c6.pdf
    • http://vizionsmc.net/durijafodanitewivaka5vvqp.pdf
    • http://fly-drive.online/ansi_a17_1_elevator_codesz195.pdf
    • https://zagibekopawof.weebly.com/uploads/1/3/1/4/131453283/01955ba23441bfe.pdf
    • https://najutumivuzobo.weebly.com/uploads/1/3/4/4/134473994/kotobixozewa.pdf
    • http://efarbok.xyz/express_vpn_crack_reddito1che.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://sobisatoto.epizy.com/59411334196.pdf
    • http://sajoveguduv.onlinewebshop.net/36975516684.pdf
    • http://kobaguwo.epizy.com/tisalokuligugexibixogu.pdf
    • http://konomubexidop.epizy.com/10068684022.pdf
    • http://nopawalaxuwaw.onlinewebshop.net/relizurozeduvukasovoj.pdf
    • http://koradanizepagow.myartsonline.com/the_deconstructive_angel_analysis.pdf
    • http://vatonafikokex.atwebpages.com/aneurisma_aorta_abdominal_tratamiento.pdf
    • http://bipegokatif.onlinewebshop.net/kutiwir.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_off00010763.bin
5f986e616a03481204bd37999da38d2795f60a740ff929e8028f12fb9e9ad5db
pdf-font-stream PDF embedded font (sfnt) at offset 0x10763 5028 bytes
font_01_sfnt_off00011869.bin
df9a78dcad53d74b7837dc1017df1b6e6cd4c48b10873fc16794c922fdd74fbd
pdf-font-stream PDF embedded font (sfnt) at offset 0x11869 11676 bytes