Malicious PDF — malware analysis report

Static analysis result for SHA-256 02c82ffd4234756d…

MALICIOUS

PDF

78.0 KB Created: 2021-01-09 16:31:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: badbed7e12a7bd69bbca8a975ab58a26 SHA-1: d1a3ff164152e58391fd12ef36debca47ca33d62 SHA-256: 02c82ffd4234756dce63477c1a8bd61443a4bb9683938b15af11471a11232715
104 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The presence of an external URI pointing to 'trafftec.ru' suggests a phishing or malware distribution attempt, likely disguised as a firmware update for a Samsung device. Although no scripts were explicitly extracted, the PDF structure and the ML detection suggest it may contain embedded JavaScript or exploit code to facilitate the download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9576

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafftec.ru/123?utm_term=samsung+sm+n900a+latest+firmware
    • https://static.s123-cdn-static.com/uploads/4424630/normal_5ff32264d47ed.pdf
    • https://rukuzidin.weebly.com/uploads/1/3/4/5/134517246/fe5667062439340.pdf
    • https://cdn-cms.f-static.net/uploads/4368735/normal_5f90decdd6ace.pdf
    • https://medizagokitoni.weebly.com/uploads/1/3/2/3/132303310/7484368.pdf
    • https://cdn.sqhk.co/wefenosefob/igfjjha/descargar_hungry_shark_world_para_pc_windows_7.pdf
    • https://cdn-cms.f-static.net/uploads/4388815/normal_5fdb578e34bb1.pdf
    • https://cdn-cms.f-static.net/uploads/4365536/normal_5f8d0e294ed11.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/ad8d4ab5-7cdd-47df-98ca-caa28c9dc4b3/10893504995.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0b8.bin
d53897fe22b1166e522084dbb5710643af443aaf20fa66f911e4c1e0d3977a34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0B8 5352 bytes
font_01_sfnt_off0000e2d5.bin
73023a59a005320c84d6ce602be8a9912a805dc12c8b12315e6ab7d745ff9e3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D5 10752 bytes
font_02_sfnt_off000107ff.bin
a1bdc24ec6dc0332449754d26803ee00bb6717469f64a18f47c680e22104396b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107FF 16080 bytes
font_03_sfnt_off00011cb5.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11CB5 4324 bytes

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