Malicious PDF — malware analysis report

Static analysis result for SHA-256 a790a37a95d10b7d…

MALICIOUS

PDF

71.8 KB Created: 2020-12-23 12:40:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: f67c0c5c4dcd4b9cb5490d510315052b SHA-1: 44b493951b445eb224ac09462e65db015a210e34 SHA-256: a790a37a95d10b7d2a7042efe45d0faf11e7d48594510a9663381b97b9c080cf
96 Risk Score
Tags
free-cdn-ebook-manual-lure

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. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to the 'Louisiana state song'. No scripts were extracted, but the presence of an external URI is a primary indicator of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffine.ru/123?utm_term=louisiana+state+song PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368969/normal_5f8c55837aac6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464865/normal_5fc1b03c2f36b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422148/normal_5fba0d6954587.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470401/normal_5fc4a682f0a3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381543/normal_5fc0161756147.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372723/normal_5f953e71dc55b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413117/normal_5fdea0f889c6e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479684/normal_5fe224e8b791c.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/d5e4be18-2737-4ddf-8bdc-14e45724bd9d/feletoxotobuvi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12429384-1a0e-44fa-a055-658b5dc0da21/jukebox_title_strips_excel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/121d8cae-7919-49d1-be09-5394475aad41/nanudorapidema.pdfIn PDF document text
    • https://s3.amazonaws.com/jefobexapulow/94898128872.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/39104562977.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/sajorelevakawivebes.pdfIn PDF document text
    • https://s3.amazonaws.com/juduk/kokumilelinamuxamopupaniv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6403096e-760d-4abb-9d6a-77f3a426eb7d/vomogugavuz.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/pifimudix.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/wii_theme_clarinet_sheet_music.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_off0000cf6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF6E 4548 bytes
SHA-256: ab86ee8cb97fdb5f2bc0e06398a2954775cb68cee7a6e7575bae40f8b63da0e8
font_01_sfnt_off0000def6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF6 10920 bytes
SHA-256: edecf67b8ccdd1221b1657ee289c523f5e54e27e394cae9c782aae25a5ab8549
font_02_sfnt_off0001040e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1040E 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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