Malicious PDF — malware analysis report

Static analysis result for SHA-256 568a69642568d97b…

MALICIOUS

PDF

75.5 KB Created: 2021-04-01 08:10:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: e901520a2e4eb8eddfc27a6c8f9e8909 SHA-1: 9a2c61008d4aa46a42cd489d1470c210e1aa8df2 SHA-256: 568a69642568d97bc1503fcb14d4f3a5e8f279d97def862f7d7ba9793a74fd27
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, with a primary external URI pointing to 'https://xajibur.ru/award?keyword=inductive+and+deductive+approach+in+teaching+pdf', suggesting a lure to a malicious site. The document's structure and numerous links indicate it functions as a link farm designed to redirect users, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=inductive+and+deductive+approach+in+teaching+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4479210/normal_5ffbb29b2b90a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413867/normal_6029a22d1d98e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460477/normal_5ff4c901bb87d.pdfIn PDF document text
    • https://rifopiponekusu.weebly.com/uploads/1/3/5/3/135346758/558413.pdfIn PDF document text
    • https://lolotabo.weebly.com/uploads/1/3/4/0/134018256/vuketodi-tokamuzu-lipuwe-jizotorevezatos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446490/normal_6046c3c0beacb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413109/normal_5fe85baa7d1c4.pdfIn PDF document text
    • https://cdn.sqhk.co/serodozire/igichib/gogiselopoxibaseluju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373999/normal_603ca9b74dabd.pdfIn PDF document text
    • https://cdn.sqhk.co/wikaraxixi/giBDgcE/jadiwerusenape.pdfIn PDF document text
    • https://bimufoju.weebly.com/uploads/1/3/4/3/134311804/bamipobogi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454184/normal_604cd4439810a.pdfIn PDF document text
    • https://pavofadibap.weebly.com/uploads/1/3/4/3/134370944/pulikovin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4859805/normal_6034535c53138.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423750/normal_6017b6a51a2a0.pdfIn PDF document text
    • https://lenonexijinex.weebly.com/uploads/1/3/4/6/134647177/3470774.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/7c0a151f-824c-4d23-ac9c-310a05f9b72f/pastor_adeboye_wedding_anniversary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec76605d-1561-48c0-95c8-6ada7f3dec35/27827176308.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8942420-6424-4bc6-be8b-93226c580e03/calories_sonic_tater_tots_medium.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBDC 5088 bytes
SHA-256: 82f953571207f2617c66d080a2d2bbc883b29361da350f29f4d85a38a4ad6a56
font_01_sfnt_off0000ed24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED24 10408 bytes
SHA-256: 2b3ae9482c0e5c501ddee09ec08e0a4c88fe923917409c61402217e68f6e150c
font_02_sfnt_off00011093.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11093 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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