Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b45f677f9aa17da…

MALICIOUS

PDF

77.5 KB Created: 2021-03-25 12:51:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f8f91827b7758427529780c4e106f44 SHA-1: 2c27e9f1c6daef1ba650e41eecb89a598ec4417c SHA-256: 8b45f677f9aa17dac09b8cd2054741f79045b63a7b0a3b67eec47bc9f5bebb6a
96 Risk Score

Malware Insights

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

The file is a PDF containing obfuscated content and multiple embedded URLs, one of which is directly referenced in the heuristic findings. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of embedded URLs suggests an attempt to redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://seumenha.ru/strik?utm_term=how+to+printable+heat+transfer+vinyl
    • https://cdn-cms.f-static.net/uploads/4421783/normal_601cb7f63c9b4.pdf
    • http://goossyy.online/hp_photosmart_c3180_cartridge_erroryv007.pdf
    • http://meine-gebuhrenfrei.com/rapid_typing_tutor_for_pc5dzb8.pdf
    • https://cdn-cms.f-static.net/uploads/4388293/normal_602e0f643f1eb.pdf
    • https://cdn-cms.f-static.net/uploads/4380078/normal_6017363421167.pdf
    • https://vibikawezawu.weebly.com/uploads/1/3/4/7/134734059/5785917.pdf
    • https://static.s123-cdn-static.com/uploads/4489992/normal_5fee4692bb807.pdf
    • http://edevletorg.com/spoken_english_book_in_bengalifvb5z.pdf
    • https://nafoxowozuvika.weebly.com/uploads/1/3/1/3/131383754/4712136.pdf
    • https://dogewirezuv.weebly.com/uploads/1/3/4/6/134699505/widopilu_raxelariled_nutitili_gixovedola.pdf
    • http://bioforcecolumbia.site/male_mannequin_3d_model_free_downloadulkst.pdf
    • http://digitalcalakk1.xyz/xekujutukaluwuguiu2we.pdf
    • http://edayafar.xyz/xugigupuz42ph.pdf
    • http://svarka-aurora.online/fuzexnnswg.pdf
    • http://show-visitor.xyz/what_is_dynamic_surface_tensioni6xwv.pdf
    • https://cdn-cms.f-static.net/uploads/4426677/normal_603b1eca400b8.pdf
    • http://shop-kid-toys.online/200063206slggc.pdf
    • https://kixivoveluvib.weebly.com/uploads/1/3/0/7/130775150/389cd40.pdf
    • https://cdn-cms.f-static.net/uploads/4449181/normal_605b654d542c0.pdf
    • https://static.s123-cdn-static.com/uploads/4424007/normal_5ffe92c202228.pdf
    • https://gupapuna.weebly.com/uploads/1/3/4/7/134726568/1609352.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://sijopar.epizy.com/cash_voucher_format_doc.pdf
    • http://somepezepu.epizy.com/how_do_i_reset_my_bryant_thermostat.pdf
    • http://segizeja.rf.gd/ancients_awakened_terraria.pdf
    • http://loratozojakin.epizy.com/11597706277.pdf
    • http://wurunuj.epizy.com/facebook_lite_app_for_android_free.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_off0000ef0f.bin
f7e37295231ca975ec0a9115cb88052301bb525268c554bd8fb9460044f48fd2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0F 5344 bytes
font_01_sfnt_off00010148.bin
d8828c2dda42bd0c0061fc024471b6646f1fb796ef2a8fe15c424667d280718b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10148 10892 bytes

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