Malicious PDF — malware analysis report

Static analysis result for SHA-256 45e10e61fa8979d8…

MALICIOUS

PDF

92.0 KB Created: 2021-03-29 14:43:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f2c70a7399d19ea8735efa811780435 SHA-1: 749fbdf142ef938b403675ed4500a333ec59f897 SHA-256: 45e10e61fa8979d8512ec83fb6fbb87a95101c71e2ad97e77bbe75d49c4dfe8d
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high probability of malicious intent. It contains an embedded URI pointing to 'https://nipisod.ru/wix?keyword=area+of+parallelogram+and+rhombus+worksheets', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to educational worksheets, a common tactic for phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://nipisod.ru/wix?keyword=area+of+parallelogram+and+rhombus+worksheets
    • http://dejepuzalew.mygamesonline.org/82771839190.pdf
    • http://toguvuveleguna.22web.org/92244970130.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/7da41893-8445-4df9-93e0-7bfeb969da70/how_to_learn_intraday_trading_quora.pdf
    • http://lakuxizutigevo.rf.gd/how_to_open_paint_in_windows_10.pdf
    • https://uploads.strikinglycdn.com/files/5fc5601c-7cfc-497f-86c7-39321e543b92/60918229846.pdf
    • http://xuresiru.epizy.com/91217330286.pdf
    • https://uploads.strikinglycdn.com/files/d13858f0-1916-47b4-b93a-7db128c15c92/la_cebada_engorda_a_los_bebs.pdf
    • https://uploads.strikinglycdn.com/files/2ba25b48-130a-43dc-9e55-25197b2c4086/what_are_the_mortgage_rules_in_monopoly.pdf
    • https://uploads.strikinglycdn.com/files/daa81cfd-03ca-4184-8f52-09c3f5c3c40c/toleramebezenafat.pdf
    • http://nagukubuliduz.rf.gd/inseam_guide_stitch_fix.pdf
    • https://uploads.strikinglycdn.com/files/f036e515-63f4-4fbb-a7f2-c875696b78e8/62741438317.pdf
    • https://uploads.strikinglycdn.com/files/af15e93c-dd83-4bb8-8f89-718f4ecbc802/used_club_car_parts_near_me.pdf
    • https://uploads.strikinglycdn.com/files/5dc5fac2-77b6-4eb2-895d-31d800511137/48401454497.pdf
    • https://uploads.strikinglycdn.com/files/3efee034-9e91-4eed-a7a6-a789427f0f37/what_is_the_main_idea_of_the_story_the_lottery.pdf
    • http://zotubune.myartsonline.com/76195597970.pdf
    • http://gawupuzilolo.epizy.com/chrome_extension_file.pdf
    • https://uploads.strikinglycdn.com/files/3c49c39f-52b5-4b5a-9c59-9bc692c04154/mudawawapate.pdf
    • https://uploads.strikinglycdn.com/files/850de858-0712-4f5f-a093-4c7819b2f127/fiterukosol.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_off0001048d.bin
a914f201893f3991c8e44b656e5b6b57c852c2a64c6bc945da30af7ed53e1d50		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1048D 5572 bytes
font_01_sfnt_off00011758.bin
6f7c93b0fd89927bd1ad8779deb7e21bcee6d07506eac1f80d66b00c29cdbd98		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11758 11224 bytes
font_02_sfnt_off00013dd1.bin
5d9cde8d47130a32f23409c5ad6eee6f55762bdf6526f87ecccf9c117f995a1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13DD1 16428 bytes
font_03_sfnt_off0001541c.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1541C 4324 bytes

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