Malicious PDF — malware analysis report

Static analysis result for SHA-256 a64abf8a2094e2e7…

MALICIOUS

PDF

83.4 KB Created: 2021-03-22 01:53:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2cde67533840642825a36b2e90db7e73 SHA-1: 28dc1a9f78fab9865bdaf76052815790e62055b7 SHA-256: a64abf8a2094e2e7db6114b9104279699883f8e4645516384b7b958c4bd2136f
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to 'https://bologen.ru/wix?keyword=arduino+starter+kit+manual+espa%25C3%25B1ol', suggesting a phishing or redirection attempt. The document body, though heavily obfuscated, appears to contain metadata related to 'wkhtmltopdf' and a title that could be a lure.

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://bologen.ru/wix?keyword=arduino+starter+kit+manual+espa%25C3%25B1ol
    • http://zutelotojenexop.getenjoyment.net/how_to_stop_adt_beeping.pdf
    • https://cdn-cms.f-static.net/uploads/4378393/normal_6044227415949.pdf
    • http://sozaxesugoj.mywebcommunity.org/sezibemoniganelakele.pdf
    • http://rasipafus.getenjoyment.net/wedixumevekadabeni.pdf
    • http://rivozuzeno.mywebcommunity.org/bofok.pdf
    • http://damomemisogadex.iblogger.org/amissulprida_bula.pdf
    • http://xoxanuf.mygamesonline.org/el_camino_del_guerrero_pacifico_dan_millman.pdf
    • http://lumufurisazela.mywebcommunity.org/solenoide_adn.pdf
    • https://cdn-cms.f-static.net/uploads/4465015/normal_6015c4bd9f05e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://porugunime.epizy.com/senior_graphic_designer_resume_summary.pdf
    • https://uploads.strikinglycdn.com/files/79e9a16b-27bf-4273-a25d-fa92b0865f90/trombosis_venosa_profunda_colombia.pdf
    • https://ec8c99fd-5413-4e38-b6a0-2ccbba71fc6f.filesusr.com/ugd/de02f3_ca647ac7dff74fc7b8e9cf0cb311483e.pdf?index=true
    • https://uploads.strikinglycdn.com/files/5f56b620-f7e0-4b5b-bcec-6479d555d951/65343588704.pdf
    • https://uploads.strikinglycdn.com/files/fd333698-cc8b-4306-acb3-52885f2a2530/vomowejolokikomajifan.pdf
    • https://41fe7446-7195-45c8-906d-de5e784989f9.filesusr.com/ugd/e02969_e2b256a5dbca4e1c8e6842f94ba89029.pdf?index=true
    • http://dovadef.epizy.com/cogat_sample_test_2nd_grade.pdf
    • https://770603ce-cae8-48b7-b4e8-6e15b9dac1cd.filesusr.com/ugd/e975af_afac6948a1fa4093be62272e52acdc3e.pdf?index=true
    • https://uploads.strikinglycdn.com/files/c5325290-298f-441d-af84-c4ea99ae4f63/51814246267.pdf
    • http://jawafezirosozo.epizy.com/math_textbook_6th_grade_houghton_mifflin.pdf
    • http://rulezebasax.epizy.com/exercice_corrig_amortissement_linaire_et_dgressif.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f789.bin
5cfc85c29868f9b14dd584b4366ef194d54541ddc78814b2bbad4fdb03675796		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF789 5252 bytes
font_01_sfnt_off00010905.bin
008865fa4ee28120ef1cd7829a27ac0956097bbabea8fcca2975d44fa6b5a559		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10905 12016 bytes
font_02_sfnt_off00013058.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13058 4324 bytes

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