Malicious PDF — malware analysis report

Static analysis result for SHA-256 9984d3925f8ff8d8…

MALICIOUS

PDF

73.3 KB Created: 2021-04-03 16:06:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 168e7f7ba78b34e7c71f3c8f3a56af81 SHA-1: c9e606cb0afa2eda0fc8aab1cdb0becc5b033b46 SHA-256: 9984d3925f8ff8d841e5e0aa438a0093d866e5d34a7146f6abe4b8f8365225ae
96 Risk Score

Malware Insights

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

The PDF 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. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to trick users into visiting a malicious site, likely as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dafemum.ru/award?keyword=atmosphere+sky+pdf
    • http://furniture21.online/ninjago_season_12_trailerli7gj.pdf
    • http://rixorevu.getenjoyment.net/89782909298.pdf
    • http://theharaka.online/15713161709nnlpe.pdf
    • http://tujidal.mypressonline.com/uniden_trunktracker_iv_bcd396xt_manual.pdf
    • http://zujuzerawijuk.medianewsonline.com/english_phrases_meaning_in_tamil.pdf
    • http://ceter.xyz/mind_control_delete_wikipediaszqd3.pdf
    • http://tokio-2020.fun/wosomop93f81.pdf
    • http://manamuposa.getenjoyment.net/temperature_sensing_devices.pdf
    • http://dehydratedoriginalgoodness.com/do_i_need_an_oxygen_concentrator5iuhc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://b6c9d0de-81a1-4db9-ab7d-8a95af9e63d6.filesusr.com/ugd/b28ae2_ffd8f9bec25e4d4ba12028957ea56e80.pdf?index=true
    • https://3bdad275-8828-414d-9063-9532e035d791.filesusr.com/ugd/c67d0c_58b794e0e94145cb94a390d1d11d726d.pdf?index=true
    • https://s3.amazonaws.com/geradi/android_app_programming_language.pdf
    • https://s3.amazonaws.com/gedexim/batata_doce_chips_informao_nutricional.pdf
    • https://s3.amazonaws.com/xisefowu/check_point_5200_datasheet.pdf
    • http://zotubune.myartsonline.com/how_to_cite_internet_sources_apa_format.pdf
    • https://8d6920c1-aef5-45ed-b1a0-e693d63948fb.filesusr.com/ugd/0a593f_74d2b14e10dc4d5da8cfbf501464539d.pdf?index=true
    • https://s3.amazonaws.com/mogipegi/answer_me_1988_gif.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0ac.bin
03379da87b22c555b71965cee14e2700b54c23003cf7803ca04b4aeab15c9489		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0AC 5192 bytes
font_01_sfnt_off0000f23a.bin
8ab8e7afb83210c74448279db01bc09d2f4aa8b55a8c09983cf48638b1e0e2fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF23A 11872 bytes

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