Malicious PDF — malware analysis report

Static analysis result for SHA-256 2314aa450fbfb10f…

MALICIOUS

PDF

93.1 KB Created: 2021-03-14 16:06:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 81f3f1ee7f4aea927a839aecf99ff495 SHA-1: 9e5a3e5751fcef66fb91e591a1a024dfa218ccef SHA-256: 2314aa450fbfb10f7a9bfc81054dad8851adb26b1edda9c1c402f732601911ce
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of multiple external URLs, including one pointing to 'nipisod.ru/award', suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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/award?keyword=genetic+algorithms+and+machine+learning+for+programmers+pdf
    • http://awpmode.com/kinibazufisusu4dgpf.pdf
    • https://cdn-cms.f-static.net/uploads/4407084/normal_604a3f9163ce7.pdf
    • https://cdn-cms.f-static.net/uploads/4468534/normal_602301408797f.pdf
    • http://lg-copyrightforms.com/dell_precision_t3500_memory_slot_configuration8fzae.pdf
    • https://static.s123-cdn-static.com/uploads/4464083/normal_5fe418d2b23c3.pdf
    • http://jobauthor.online/acatist_sfantul_nectarie8vtf1.pdf
    • http://klyshsheff.xyz/16887715956dqno9.pdf
    • http://app-3null.com/garmin_gtn_750_for_sale_ebay2jfit.pdf
    • http://helpforteam.com/nordictrack_e9_ellipticalax6tm.pdf
    • http://doucheop.xyz/36654059853z7bme.pdf
    • https://cdn-cms.f-static.net/uploads/4483071/normal_5fe8d8824cd71.pdf
    • https://static.s123-cdn-static.com/uploads/4467601/normal_5ff031c6a5c4e.pdf
    • http://knitfqph.site/891488880565caps.pdf
    • http://italia-doc.fun/interesting_answers_to_what_s_upu70mf.pdf
    • https://cdn-cms.f-static.net/uploads/4380881/normal_601d5c2bb7514.pdf
    • http://a-trvl.ru/hadoop_the_definitive_guide_freeqck5a.pdf
    • http://edarudost.online/45860838893w3qq0.pdf
    • https://static.s123-cdn-static.com/uploads/4475854/normal_5fcaf087d496a.pdf
    • http://koreanluxe.com/816671498078wtde.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/9cdb813c-baee-4e52-b538-975e159298f8/lesidujolojefokama.pdf
    • https://uploads.strikinglycdn.com/files/b923dba5-b1fd-4c28-99ea-15453408bdf8/mevelebelavus.pdf
    • https://uploads.strikinglycdn.com/files/05d77a64-a7f6-44f5-9a63-a81a2788c34c/tarasexodavoponadubibu.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_off000106cb.bin
308617026c436166128f02c3786e7e7ba08e3237b61d6678916485743c7b7a9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106CB 5388 bytes
font_01_sfnt_off000118f2.bin
16de931bf5cfb88d908e8ccd94b6838d688e9fd736a7126bd60df23586abbec8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x118F2 11516 bytes
font_02_sfnt_off0001404c.bin
541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1404C 16204 bytes
font_03_sfnt_off0001557a.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1557A 4324 bytes

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