Malicious PDF — malware analysis report

Static analysis result for SHA-256 648f1d893433317b…

MALICIOUS

PDF

71.0 KB Created: 2021-04-04 14:57:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f6d307163f1de579b24c15ea042d217 SHA-1: 0711b87ace130a892dabd1e3b1bec0378418eaff SHA-256: 648f1d893433317b2cfea3c764bf06c6db4cc178b1a7b28613f7320cef949e81
96 Risk Score

Malware Insights

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

The file is a PDF containing numerous embedded URLs, many of which point to PDF files hosted on suspicious domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the detection suggest the document is designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://cdn.sqhk.co/gotofebelu/dOuo0gd/tipodesirebewixamimo.pdf
    • https://cdn.sqhk.co/kufomopinu/hdhgOgd/64359395825.pdf
    • http://fitness1.space/34535110090koor0.pdf
    • http://sdfafq.info/zarawufikubijibakuxemegizzfmi6.pdf
    • http://vitodibiwanezej.mypressonline.com/53474030452.pdf
    • http://jirusulixozome.scienceontheweb.net/fedidizuvil.pdf
    • http://pasetbs.xyz/sanepigepigexodawovu2vnx4.pdf
    • http://kavelokafozi.medianewsonline.com/48868099339.pdf
    • http://serviceforyou.site/24005395999q67p5.pdf
    • http://ginupedarokuxu.getenjoyment.net/livro_contra_o_calvinismo.pdf
    • https://cdn.sqhk.co/letojeka/giTY5ie/sniper_shooter_3d_game_download_for_pc.pdf
    • http://hugertely.xyz/33952938849319ql.pdf
    • http://agent-spv.space/33646137010dnza.pdf
    • https://cdn.sqhk.co/duzokezubeka/fghQyZp/rise_of_skywalker_cast_general_pryde.pdf
    • http://edalovert.xyz/zovanatudov8cjh0.pdf
    • https://cdn.sqhk.co/nurijodefa/DghhcQA/toxajiguranakugasimatoje.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://feedproxy.google.com/~r/wb/ENAH/~3/3IgsHNHpEfs/wb?keyword=bass%20guitar%20exercises%20for%20dummies%20mp3
    • https://45b0b119-5f8c-43e7-b437-4e12d17c1c81.filesusr.com/ugd/3826db_758b0663348946d184ca83f5991d6203.pdf?index=true
    • https://7f1888b6-cdab-4603-9914-1cf81a8b29aa.filesusr.com/ugd/6846fe_9d898bc7c5c3411ea079a689ad9023b5.pdf?index=true
    • https://s3.amazonaws.com/fipijife/tozasixu.pdf
    • https://s3.amazonaws.com/bidemewufa/fujitsu_scansnap_ix500_operating_manual.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d41b.bin
c25f8f245eab4b4a6b2e0e05dd3febc6008ade4083c1834641739a46d8bc3075		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD41B 5724 bytes
font_01_sfnt_off0000e78c.bin
c831ed7192df59d658be2b3fa73a8f212b762c26b52b23fa5ffa3425b80ca66a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE78C 10996 bytes

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