Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffa5bb96ef2cc444…

MALICIOUS

PDF

97.4 KB Created: 2021-01-16 11:23:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 0b1440391de02bfbe5e130f2aa1d8445 SHA-1: 05f7354fe2985b389051de2a9d2201bf64af63ec SHA-256: ffa5bb96ef2cc444e4be51ecfdc9a523aa3d74935d60eaa7ceeff0d1a3d164bf
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The embedded URL points to a suspicious domain, likely used 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, consistent with spearphishing tactics.

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://trafficel.ru/123?utm_term=how+is+wiz+khalifa PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4385631/normal_5fcb344879b43.pdfIn PDF document text
    • https://site-1180237.mozfiles.com/files/1180237/28060269050.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388416/normal_5f913935a41ea.pdfIn PDF document text
    • https://site-1236948.mozfiles.com/files/1236948/custom_receipt_book_template.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472488/normal_5ff40a588f571.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426261/normal_5ffb322c96c7b.pdfIn PDF document text
    • https://site-1168324.mozfiles.com/files/1168324/mod_emerald_items_map_for_crafting.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/sefipa/faringoamigdalitis_bacteriana_tratamiento.pdfIn PDF document text
    • https://s3.amazonaws.com/gozifep/32170781945.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/fetowapenatetabidi.pdfIn PDF document text
    • https://s3.amazonaws.com/luworizesupox/excel_analysis_toolpak_add-_in.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/paint_the_town_red_apk_obb.pdfIn PDF document text
    • https://s3.amazonaws.com/pezofut/58331434073.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000130e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130E6 4928 bytes
SHA-256: 9bd1d3c65f436f96fb1348f4e8a095ef5a502ad7d4d4471e4122c82e8ddd2c7b
font_01_sfnt_off000141c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141C8 11804 bytes
SHA-256: 1cfd5479cc39e130ddfc6682fd4d6e6a36893bfb2fcf7ec02c7cdb308b571560
font_02_sfnt_off000169b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x169B4 6128 bytes
SHA-256: de7cd77d069192b6eb161bf3216f35de75d695314482f32e008ba1f250f3410d

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