Malicious PDF — malware analysis report

Static analysis result for SHA-256 51a80e1ad1e1bdf7…

MALICIOUS

PDF

75.9 KB Created: 2020-12-23 19:37:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: f4bfff5073ca69414e2dbb1d96de3dc9 SHA-1: 9090edc82ccc143e7f2aed4148aa9ba95b0d2d7c SHA-256: 51a80e1ad1e1bdf7244c0a90ac5d05c8d62d5a1dc6860816c563c4c85cebd351
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is a strong indicator of malicious intent. The ML classifier and ClamAV detection further support this assessment. The document body, though heavily obfuscated, contains text that appears to be a lure related to a game mod apk, suggesting a phishing or malware distribution attempt.

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/strik?utm_term=horse+racing+3d+game+mod+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368977/normal_5f8a3fe988471.pdfIn PDF document text
    • https://rujupiben.weebly.com/uploads/1/3/4/8/134852491/navuduvin_muzokitu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377380/normal_5f9481b41a395.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461761/normal_5fdecb31af6a1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391634/normal_5fcd07f85f19f.pdfIn PDF document text
    • https://disaximineta.weebly.com/uploads/1/3/4/8/134883765/8785926.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388163/normal_5fde17bd1061a.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/panokojol/applied_physics_2_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/lubulabimenafetote.pdfIn PDF document text
    • https://s3.amazonaws.com/veraxawewib/zuvugurekaven.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b89bc22d-2710-4ccf-b970-dcdac9aadd41/elite_torrents_peliculas_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/bejexe/tozukoperu.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/libunixi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3712a868-72a5-411c-bbd1-ced422b8d974/87296647953.pdfIn PDF document text
    • https://s3.amazonaws.com/legipalofi/cash_flow_statement_direct_method_proforma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/584b188d-0557-4673-9654-ed94b99fa1e4/gukomirapolovekil.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00010681.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10681 18040 bytes
SHA-256: 158fbd878562ef62f08936476d666f1c1ee9f4be44e064d7210d12b28037a20d
font_00_sfnt_off0000c7b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7B9 5552 bytes
SHA-256: 1696b1e4478f20ba194cd33ba85d3cf935bc8f7f3bbee01d22a4b1b0cd05030c
font_01_sfnt_off0000da82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA82 13696 bytes
SHA-256: 9ed38c043003edc97f9561977fe9f5c0a3e16ddfe3a6398e7d00adb20d777b01

Open this report in the interactive analyzer, or submit your own file for analysis.