Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d1aa14c57880454…

MALICIOUS

PDF

163.8 KB Created: 2021-03-13 22:57:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e877d8761dde5ac7bac7b551e923f72 SHA-1: 98434150e866aef929ae7202ce606a26f6909315 SHA-256: 7d1aa14c5788045401619c218285ec209eacee40af6bbab9e3a5e0184164f340
96 Risk Score

Malware Insights

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

The file is a PDF that contains embedded URLs, one of which is associated with a phishing lure related to a 'grade 7 math textbook pdf'. The ML classifier and ClamAV detection strongly indicate maliciousness. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure suggest it is designed to trick users into downloading further malicious content or visiting phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://jumiwimov.ru/strik?utm_term=grade+7+math+textbook+pdf+philippines
    • http://ludoritepiru.22web.org/sony_bravia_tv_apps_free.pdf
    • https://nivodeweje.weebly.com/uploads/1/3/4/4/134446465/4434f436b83545b.pdf
    • https://javufivupa.weebly.com/uploads/1/3/4/3/134349262/mobelisunor.pdf
    • https://rajezedej.weebly.com/uploads/1/3/2/6/132682549/63793.pdf
    • https://nifonafepo.weebly.com/uploads/1/3/5/3/135319448/7456840.pdf
    • http://shopsmmv.site/fruit_ninja_blender_not_workingvyp0j.pdf
    • http://straponartist.com/643581447653n6pp.pdf
    • http://austritkfa.com/14578018291wc8pa.pdf
    • http://copyright-services-us.com/26549031939g3iwa.pdf
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://9eaa565e-fb97-40b4-b096-d6760803f699.filesusr.com/ugd/55e2c6_d56e773f82c642cc807bf12b80285f0d.pdf?index=true
    • http://tenowuwewid.epizy.com/fewatuxowimajemusilolude.pdf
    • https://f1801c53-b3f5-4b94-a9b3-4bb8eb376a66.filesusr.com/ugd/af633f_4227dffd5f324309a4d34a5e6af30b1e.pdf?index=true
    • https://s3.amazonaws.com/rumezo/weekly_lesson_plan_template_preschool.pdf
    • https://s3.amazonaws.com/fedufiporara/92298589638.pdf
    • https://29c5b005-6627-40e3-9da1-9f9d3dbc34dc.filesusr.com/ugd/7ad284_b43efaf551c94421983b06b1161f7049.pdf?index=true
    • https://s3.amazonaws.com/gavexilatuvitaz/chaim_potok_the_promise.pdf
    • https://cf2e1f24-e5f1-4289-9567-3affce9c164e.filesusr.com/ugd/a4ea6c_ee2a5bd3947243ff866d992e384485b2.pdf?index=true
    • https://55d63786-14d6-44de-84d0-33f1fb383c44.filesusr.com/ugd/45fd81_07d6edae21d34a90bc87e415c9928570.pdf?index=true
    • https://45ae50e1-98a8-4501-9ad6-fc0df438eb43.filesusr.com/ugd/b16523_ade36ed2f3754cc28b0774ce1b10e38c.pdf?index=true
    • https://s3.amazonaws.com/metakibeme/nephew_meaning_in_english.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
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000217ea.bin
c5031a16efcc5379ad48164f06206cdcd24646dd77534c8631ff4bde209fe678		 pdf-font-stream PDF embedded font (sfnt) at offset 0x217EA 9824 bytes
font_01_sfnt_off000232a8.bin
427a45109b3032a158023ba1083b7e4e0e410fd2ff6f1c66ed077087c4ebe011		 pdf-font-stream PDF embedded font (sfnt) at offset 0x232A8 5664 bytes
font_02_sfnt_off00024589.bin
fba9f6d5d467b7d6bbccdc8ac95b73ea8a6825a62cfb156e50cd914bb525142d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24589 6300 bytes
font_03_sfnt_off000254e2.bin
16d9cc9a59711bb94db517aa1118794dcbe899ac0a6c49aebdc2fc8d502b9610		 pdf-font-stream PDF embedded font (sfnt) at offset 0x254E2 12704 bytes

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