Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d3b1fa9a711d3db…

MALICIOUS

PDF

75.5 KB Created: 2021-03-03 10:44:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 979d7a38b927c0b59ede07ba3fb905ef SHA-1: 7c3baf62c5994637191249654c1fff8d14caf191 SHA-256: 3d3b1fa9a711d3dba1f45e628f4de5a11f066bacbcb32ace434a9b35b662cfaf
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. Heuristic analysis and ClamAV detection confirm its malicious nature, classifying it as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to 'cleaning big boss air fryer' to entice clicks on the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://xajibur.ru/award?keyword=how+to+clean+big+boss+air+fryer PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367005/normal_6027195061392.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483365/normal_5ff781fa38d23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387419/normal_601cfd2ee86fb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455178/normal_5fe0c280a3581.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375207/normal_6013854a7180f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446027/normal_603b49152d7f3.pdfIn PDF document text
    • https://cdn.sqhk.co/feluxolid/hgMTiaK/the_walking_dead_season_10_season_finale_date.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462345/normal_5fe36a48eec6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445343/normal_60107faadd624.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380871/normal_5fee34e3e7608.pdfIn PDF document text
    • https://cdn.sqhk.co/gukokefa/ge1ihfk/monkey_king_ironheart_movie.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366400/normal_5fdef5f873e40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424400/normal_6024a959c2de4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376602/normal_600ea2196a197.pdfIn PDF document text
    • https://cdn.sqhk.co/dilizilozok/bzghjhT/wedenupitik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405674/normal_5fdc74876aa3c.pdfIn PDF document text
    • https://cdn.sqhk.co/zarudaletok/RoA3Gic/96191971948.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nagikesedogoru.rf.gd/boss_film_songs_kannada.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_off0000ead1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD1 5344 bytes
SHA-256: 5ed13e5679b6dc9ccc5de83e1410617ea659da9615bb6411835b8106f6ac6b49
font_01_sfnt_off0000fd29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD29 10520 bytes
SHA-256: 1149313866e44bf54a5baae6f80510eb90744be2a1472fbe4f59239a258792fb

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