Malicious PDF — malware analysis report

Static analysis result for SHA-256 40273525c1507d71…

MALICIOUS

PDF

70.4 KB Created: 2021-02-18 14:50:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: b97aa088f066d3937e2888417f5c4c86 SHA-1: 7fff184270c7fd5b05ec7931470c525a298f2ad4 SHA-256: 40273525c1507d7155094453643b964c943bcaf7e1b4b5ca21ab0034dd8ed47a
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. The heuristic 'SE_BROWSER_INSTALL_LURE' indicates the document likely prompts the user to install a fake browser extension or update to access content. The embedded URL points to a suspicious domain, suggesting it is part of the attack chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://baarspo.ru/aws?utm_term=stranger+in+a+strange+land+iron+maiden+chords PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4385415/normal_5fe543598eeb0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375356/normal_60245f7beb4ea.pdfIn PDF document text
    • https://cdn.sqhk.co/jesovolavig/agijdjj/85228310603.pdfIn PDF document text
    • http://kukikifo.iblogger.org/6578846854.pdfIn PDF document text
    • http://nubigawe.22web.org/41216125414.pdfIn PDF document text
    • http://fuzirirofo.iblogger.org/fatejokuvisebemixidonuko.pdfIn PDF document text
    • http://mavpa.fun/23014954663lshsa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366625/normal_5fe12558558aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390057/normal_5fe7eb87ab90e.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/vososasoxumete/3068718365.pdfIn PDF document text
    • https://s3.amazonaws.com/lotibabakuj/wirawuwavudivodefupojine.pdfIn PDF document text
    • http://kiwozoma.epizy.com/dead_island_2011.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxomigo/bengali_movie_jalshamoviez_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/formel_areal_af_trekant.pdfIn PDF document text
    • https://s3.amazonaws.com/zukogi/71780151472.pdfIn PDF document text
    • https://s3.amazonaws.com/xupizewuxere/puzidesakarujal.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/truecaller_pro_apk_free.pdfIn PDF document text
    • http://lelisavebak.rf.gd/regoxedopogowezisomekak.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_off0000d3a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3A3 5456 bytes
SHA-256: 6ea0233b5b281b7e834e41585dba3b28e38fa007371244e7216b4eab4b3bc359
font_01_sfnt_off0000e603.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE603 11248 bytes
SHA-256: a3b24a1b642172fc7b7920e73a9049b67ed9d6c32080edd2e2efa42ffcac9556

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