Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a11c3e409734511…

MALICIOUS

PDF

89.3 KB Created: 2021-03-15 01:59:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a8bfa5e241334a3f368f934a506538c SHA-1: 1206a48c9573fa5d767da76f1a1908d4214d2e59 SHA-256: 9a11c3e409734511e0abb4d8c603f04435dd179559bb1eb6618724f29015d051
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is a strong indicator of phishing or malware distribution. The ML classifier and ClamAV detection further support its malicious nature. No scripts were extracted, but the presence of the external URI suggests an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://ponafet.ru/strik?utm_term=4moms+pack+n+play+dimensions
    • https://static.s123-cdn-static.com/uploads/4384028/normal_60084269ea147.pdf
    • https://cdn-cms.f-static.net/uploads/4444856/normal_60371735da030.pdf
    • https://cdn.sqhk.co/lemisobe/gdhejit/life_simulator_3_wiki.pdf
    • https://cdn.sqhk.co/totafeta/iidjihf/amazon_prime_now_whole_foods_gift_card.pdf
    • https://cdn-cms.f-static.net/uploads/4461245/normal_600d9f03d27eb.pdf
    • https://cdn-cms.f-static.net/uploads/4491936/normal_5fd7ceb4a84ea.pdf
    • http://sibogufurab.medianewsonline.com/maternity_leave_letter.pdf
    • https://cdn.sqhk.co/bewewojiwo/mwBgjiL/social_media_downloader_ios_13.pdf
    • https://static.s123-cdn-static.com/uploads/4501486/normal_5fc6b1a9430ff.pdf
    • https://cdn-cms.f-static.net/uploads/4402964/normal_603077c6e816e.pdf
    • https://cdn-cms.f-static.net/uploads/4366343/normal_602c2fc06501e.pdf
    • http://zazorin.scienceontheweb.net/while_loop_in_pseudocode.pdf
    • http://nipizakevenuvis.scienceontheweb.net/rajozapenojediz.pdf
    • https://static.s123-cdn-static.com/uploads/4448746/normal_60026f7a8d3e3.pdf
    • https://cdn.sqhk.co/tazakabebilo/gXhhjhk/24465460138.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/bisiku/converting_hours_to_minutes_worksheets_grade_4.pdf
    • https://s3.amazonaws.com/patilawasu/kulilapewokoxaketogepumar.pdf
    • https://s3.amazonaws.com/julexekubaj/2018_monthly_calendar_template_excel_editable.pdf
    • http://dafukip.myartsonline.com/vocabulary_for_ielts_free.pdf
    • https://s3.amazonaws.com/xirixepo/52827271051.pdf
    • https://s3.amazonaws.com/xuvamuba/historia_del_estado_de_mexico_desde_la_epoca_prehispanica.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_off0000fc96.bin
d0b3111264a30213c92f55e0eb0b345d03ac76ef3175b075f9d9b470e5b034a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC96 4992 bytes
font_01_sfnt_off00010d79.bin
33282c4fa95fe20a2dcb22d74e28e7716c03c039ffc6be55e493ebc2795f1cda		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D79 11412 bytes
font_02_sfnt_off0001347b.bin
a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1347B 16204 bytes
font_03_sfnt_off000149a8.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x149A8 4324 bytes

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