Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d98b22cc79b2be2…

MALICIOUS

PDF

73.3 KB Created: 2021-02-13 06:27:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 75805e24d8c930eac0ec51e14538e0ab SHA-1: 332c7b14fb97770ef65e0572234408a823504483 SHA-256: 4d98b22cc79b2be229e81503c1b091f1e62c72e9bbee6ccd34db0409d32a5d7e
96 Risk Score

Malware Insights

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

The file is a PDF document that contains numerous embedded URLs, many of which are suspicious. The ML classifier and ClamAV detection strongly indicate maliciousness. The document body, though heavily obfuscated, appears to be a lure, likely intended to trick users into clicking on one of the embedded links, which likely lead to phishing or malware download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/wix?keyword=lancer+barrage+questions+and+answers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4374536/normal_5fe16a5346822.pdfIn PDF document text
    • http://republvinb.fun/macroeconomics_blanchard_4th_editionq8du8.pdfIn PDF document text
    • http://ca-management.website/ms_dhoni_movie_in_hdy8f89.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488332/normal_5ff9364ab86f8.pdfIn PDF document text
    • http://cookwellbakewell.com/priya_bhavani_shankar_imageh8uw1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460055/normal_6002dec8b821f.pdfIn PDF document text
    • http://50offstore.pro/16940126173mt91x.pdfIn PDF document text
    • http://tamakar.tech/88431696825qsueb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468843/normal_5fc5b2ba229fc.pdfIn PDF document text
    • http://yesnutural.space/vugikiwafufesasugevelefulpqtz3.pdfIn PDF document text
    • http://bazis-rostov.com/windrunner_jacket_men_s_sale9t5n8.pdfIn PDF document text
    • http://rukozhop-guide.com/cool_black_wolf_wallpaper_hdu3436.pdfIn PDF document text
    • http://devgm.design/el_grito_manso_practica_de_la_pedagogia_criticansbf9.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/xidazeze/bsg_guidelines_celiac.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_off0000e27a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE27A 5372 bytes
SHA-256: 26bf6f30aea0f4bbf234a77dd4b66aa328f87ab10aae55159a6b75b077374f3a
font_01_sfnt_off0000f4d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D3 10500 bytes
SHA-256: 8f57d33dbd144965701f8a15a213d3851a30c32bddc77e7e13f2872f2de69691

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