Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9bbe53ad2459b52…

MALICIOUS

PDF

86.2 KB Created: 2021-03-13 17:54:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 779702f79c4c6024ea0434f6ff49e183 SHA-1: e8d95add7d048d8789b5fda276fd3763d29351b7 SHA-256: e9bbe53ad2459b52582cc74ce4c68d8411614558fdbb007a202ffd6ada57c2cd
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is a PDF that contains an external URI pointing to a suspicious domain, and ClamAV detected it as a phishing trojan. The presence of a visual download button suggests a social engineering lure to trick the user into downloading a payload. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://botokaw.ru/aws?utm_term=heidelberg+catechism+for+youth
    • https://cdn.sqhk.co/vudemijugamu/ihjfajg/guvowaxibaju.pdf
    • http://juniwasobevi.22web.org/66661914506.pdf
    • http://kanobukomovis.iblogger.org/tigerhearts_shadow_free_download.pdf
    • https://cdn.sqhk.co/sagitusat/hijhgiI/aldi_keto_shopping_list_printable.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wubizojojepiso.epizy.com/what_questions_to_ask_in_a_nurse_manager_interview.pdf
    • https://s3.amazonaws.com/safenalavojuwu/68513782445.pdf
    • https://uploads.strikinglycdn.com/files/742d3e24-8e87-4c64-9dc2-4f2a76b07fb6/90709777352.pdf
    • https://s3.amazonaws.com/minegikukovel/prazosin_medication_guide.pdf
    • http://dovukixopajiduw.epizy.com/car_running_lean_no_codes.pdf
    • https://s3.amazonaws.com/pisedij/ccleaner_pc_2019.pdf
    • https://s3.amazonaws.com/wibedubosateg/manual_de_bibliotecas_escolares_y_de_aula.pdf
    • https://uploads.strikinglycdn.com/files/9778e8ef-8bed-408e-850a-88895ab032ae/how_to_trade_bitcoin_without_fees.pdf
    • https://uploads.strikinglycdn.com/files/6896596b-7d7c-4371-95f8-177b0e510dba/taylor_body_fat_scale_5596_manual.pdf
    • https://s3.amazonaws.com/nitajosasa/encyclopedia_americana.pdf
    • http://ramawotinejog.epizy.com/misubijopelas.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_off0000f72a.bin
9c159bb8bdeafc0b638002032b423c51d6b2c9ec7cda8f24c664e96bef40eddf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF72A 5640 bytes
font_01_sfnt_off00010a2c.bin
01b22609e096e0e69834f42b204ab551d4804ef255358b123e8623c08b6200d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A2C 8996 bytes
font_02_sfnt_off00011c44.bin
6a77f955d39b9d81e75477a2b3a68a06f90d7b352a411c8fd057aba46c531b2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C44 2236 bytes
font_03_sfnt_off0001265b.bin
b6542b0ae7d7e2e0f26c9a01695b56fc798a8de772b2207fb95c9c85eed5a568		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1265B 10812 bytes

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