Malicious PDF — malware analysis report

Static analysis result for SHA-256 663220ec60acd80e…

MALICIOUS

PDF

69.6 KB Created: 2021-01-01 11:09:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: b3f3e4d841f0239d5302426092269c66 SHA-1: 98385c0df1ebf34dec88b57caae3f2c1ee12bc2e SHA-256: 663220ec60acd80eb641d660a52eec7e68e3e63eebbe17206ab816319f32961e
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, which is a common phishing tactic.

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://trafffe.ru/123?utm_term=what+are+the+elements+of+drama PDF link annotation
    • https://sifumoxijobobo.weebly.com/uploads/1/3/4/4/134493963/jerisolomix_relebupugiz_puwen.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379859/normal_5fbc61ce07201.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390057/normal_5fee8ff10f9e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379855/normal_5f9284ab8324a.pdfIn PDF document text
    • https://cdn.sqhk.co/supesuvepo/d5jjWt9/telugu_movies_2018_list_imdb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385421/normal_5f9f941084606.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366375/normal_5fb610f3aba3e.pdfIn PDF document text
    • https://jisuzinux.weebly.com/uploads/1/3/4/6/134671095/e110ad7ba36a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef9c9f52-55ea-42b0-97d0-63db467786ea/49419100527.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c71420d-3e28-4322-a21b-042d0eea2244/diy_wood_pallet_garden_ideas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23106253-27ea-4e80-b8b8-c1d01425b2f8/bible_verses_about_babies.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/cisco_network_security_baseline.pdfIn PDF document text
    • https://s3.amazonaws.com/nagev/93853791441.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_off0000d455.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD455 5160 bytes
SHA-256: 5b2ab917ce3f50692f69c4262d65d8d41f3b55093c5673919fd01569d1c34a2c
font_01_sfnt_off0000e5c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C3 10476 bytes
SHA-256: 7f9076c9d5982746baa125805fa6acacb3bef6662f9e01b3f936b2b72adfffd6