Malicious PDF — malware analysis report

Static analysis result for SHA-256 d245641577478c1a…

MALICIOUS

PDF

102.1 KB Created: 2021-04-01 01:54:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5010ad207f4585afe67cc20781e412c4 SHA-1: 9f53b0f5f0ba47300585b61c37b33e406844c8a3 SHA-256: d245641577478c1aa9c941b1ae6f1b3a28bb266babc8cc6c1d8ea35588b0829f
96 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and heuristics indicate it is malicious, with a high ML score and ClamAV detection. The document body, though obfuscated, suggests a lure related to typing Malayalam letters, directing users to a suspicious URL. The presence of embedded URLs and the overall malicious classification point towards a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://ponafet.ru/strik?utm_term=how+to+type+malayalam+letters+in+keyboard
    • https://zaxizibu.weebly.com/uploads/1/3/4/6/134672664/1758338.pdf
    • https://dasovarelebeji.weebly.com/uploads/1/3/4/7/134712834/tutox.pdf
    • http://slmit.fun/19639730321td7gd.pdf
    • https://cdn-cms.f-static.net/uploads/4418401/normal_602ee6f2c33c7.pdf
    • https://cdn-cms.f-static.net/uploads/4382974/normal_604825eedffd4.pdf
    • http://uptodate.site/74417684455hmi92.pdf
    • http://vinnipoh.fun/the_little_icu_book_of_facts_and_formulasudfcv.pdf
    • http://save50it.pro/demutaruxhvlh.pdf
    • https://static.s123-cdn-static.com/uploads/4374979/normal_5fcdd7ea496a1.pdf
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102Hussain
    • http://smc.org.inhttp://smc.org.in
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://uploads.strikinglycdn.com/files/f4304f9e-186d-4616-903a-c11adf20a5e4/what_does_purchase_allowance_mean_when_buying_a_car.pdf
    • https://s3.amazonaws.com/sefiwegegagu/25340940662.pdf
    • https://9ef77391-fdd1-48d8-ba15-364b07375333.filesusr.com/ugd/ebefdf_408b74142981428d9725fde1bd68488e.pdf?index=true
    • https://22e365c6-0853-42e1-82f8-83473bf9c0bf.filesusr.com/ugd/217d68_5198a21c9d2d4602b67264e24464bee1.pdf?index=true
    • https://s3.amazonaws.com/bugutaj/dufiximadipamuvutivi.pdf
    • https://s3.amazonaws.com/devuxuzejozam/gajipinowososajatanejab.pdf
    • https://uploads.strikinglycdn.com/files/fd60999b-92d5-4830-884c-26564f84e48d/30926184609.pdf
    • https://s3.amazonaws.com/bojafazes/jonazenagesepinaj.pdf
    • https://uploads.strikinglycdn.com/files/ec385324-e9c8-4c4e-8ebc-604f1a3db14b/is_vicks_humidifier_harmful_to_dogs.pdf
    • https://e4fb9bf1-a3d6-4767-9bf2-2a1021e5dc09.filesusr.com/ugd/53cfc7_e17e545ca64e4270963266a5407cdf5b.pdf?index=true
    • https://s3.amazonaws.com/pegozegi/kigorasisodenoxexikavab.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/
    • https://gitlab.com/smc/meera/blob/master/COPYING
    • http://scripts.sil.org/OFL
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00011f5e.bin
f85a3864bb206885321f5b053102c0222c71d215f7f8aa278372ce3a51123b13		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11F5E 14164 bytes
font_00_sfnt_off0000f75f.bin
406517d2bb0623db24e383b418cef8a770d8c491c764cd0a9d97ceb44452d833		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF75F 5464 bytes
font_01_sfnt_off000109e1.bin
d5b3d3964a27ecb5bb716595ae2471cc8d5820aaf53451a9643fd001073e8b60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x109E1 2576 bytes
font_02_sfnt_off000113c2.bin
4cd60777e265fafd80a6c4ac8a8f541642313e2b1c6670a3899fdf55b12f51bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x113C2 3772 bytes
font_04_sfnt_off00014c51.bin
d308ec94fcdfb52b4610200cef7ccd1accfb1ebf32e4cb75de78570cc64eb7a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14C51 11388 bytes
font_05_sfnt_off000172e2.bin
18c238ad931013c02f8b9edf520ceec5ec83417eda11db08e4be278b2e55a3cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x172E2 16060 bytes

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