Malicious PDF — malware analysis report

Static analysis result for SHA-256 a92e4e5db46f911f…

MALICIOUS

PDF

91.0 KB Created: 2021-03-26 17:59:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 145fd336a9c9890bcab67f153c416a4a SHA-1: d2c6d0854e0ab3d138c20e7728a0d249774a0963 SHA-256: a92e4e5db46f911f4dcf4f9210d4dd15068921cc59e34ca06f77d0d5546d0130
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL. Static analysis heuristics and a machine learning classifier flagged this PDF as malicious, with ClamAV identifying it as a phishing trojan. The embedded URL, https://seumenha.ru/award?keyword=theory+of+inventive+problem+solving+pdf, is the primary indicator of malicious intent, likely leading to a phishing or malware download page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://seumenha.ru/award?keyword=theory+of+inventive+problem+solving+pdf
    • https://jazawimap.weebly.com/uploads/1/3/5/3/135346256/4496634.pdf
    • http://texivej.sportsontheweb.net/burawoy_manufacturing_consent.pdf
    • https://matexofetuboso.weebly.com/uploads/1/3/1/4/131453592/biwixaredogarenefo.pdf
    • http://rasazevedip.22web.org/financial_statement_analysis_journal_articles.pdf
    • https://nokesopupikes.weebly.com/uploads/1/3/4/7/134767934/7327364.pdf
    • http://ruguwafe.scienceontheweb.net/eight_limbs_of_yoga_definition.pdf
    • https://xinemituvirow.weebly.com/uploads/1/3/4/1/134108685/3515433.pdf
    • http://vazawujuzu.sportsontheweb.net/brother_tn_420_drum_reset.pdf
    • http://xodesat.22web.org/speciation_definition_biology.pdf
    • https://paxituzupinemof.weebly.com/uploads/1/3/5/3/135303349/rugeg_kitekakot.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://duvodix.myartsonline.com/sesopedadakare.pdf
    • https://s3.amazonaws.com/xulepiwa/47832109397.pdf
    • https://s3.amazonaws.com/wazagidonux/difference_between_diamagnetic_and_paramagnetic_materials.pdf
    • https://s3.amazonaws.com/tapelu/69372051441.pdf
    • https://uploads.strikinglycdn.com/files/fe644105-a7d8-4acb-b19f-1b65c170ab6a/max_lucado_church_service.pdf
    • https://s3.amazonaws.com/wozowuledij/securecrt_32_bit_full.pdf
    • https://uploads.strikinglycdn.com/files/de225ebe-ff01-42d3-9ec1-e1c5e67ce2a4/romeo_and_juliet_persuasive_letter.pdf
    • https://uploads.strikinglycdn.com/files/975f7b88-2bbe-423c-8eeb-196e97f83405/varala.pdf
    • http://vufilupirudote.rf.gd/90529463279.pdf
    • http://gagugitebuf.atwebpages.com/asciidoc_tutorial.pdf
    • https://uploads.strikinglycdn.com/files/ddb0dbab-244e-43f3-ab3d-88ee8314208e/what_should_i_study_for_my_permit_test.pdf
    • https://s3.amazonaws.com/jolituzoji/similarities_between_harry_potter_and_the_goblet_of_fire_book_and_movie.pdf
    • https://uploads.strikinglycdn.com/files/0da14ff6-bc93-4f48-a390-8f96f6cb2dff/kobatazuwemanurugov.pdf
    • https://uploads.strikinglycdn.com/files/ecbf09f7-cd3d-4e8f-ab90-68ccbb7fd6f2/29223462577.pdf
    • https://uploads.strikinglycdn.com/files/83a1ab27-c653-4589-9d47-55eb85de43ce/nitro_pro_10_convert_to_word.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_off00012140.bin
84212e66d4e3dac277c0e719bad598598fdbb608bc9bc8ac370182b103031596		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12140 5496 bytes
font_01_sfnt_off000133d2.bin
c85256f360c1b2d63232caca551802e92ea105dd4873613e891306e8d21a6535		 pdf-font-stream PDF embedded font (sfnt) at offset 0x133D2 12696 bytes

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