Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fc8bcf3ce8110c5…

MALICIOUS

PDF

78.5 KB Created: 2021-04-23 11:57:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 778209ac4ef879af82ecbbefbb8e6eaf SHA-1: cbcac0f0a3959886e6eeac81677a7737c85d1119 SHA-256: 2fc8bcf3ce8110c51c08e43b105b0a324e55ed64e11276aa8e18ab782d490208
124 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, appears to be a lure related to JEE Mains exam topics, aiming to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6432

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://xezojetit.ru/strik?utm_term=what+are+the+important+topics+for+jee+mains
    • https://gonagulinifuf.weebly.com/uploads/1/3/1/8/131856247/vaxolibuzagomu_kapovanadek_gufixu_gapubonowe.pdf
    • https://wigowaziralo.weebly.com/uploads/1/3/4/4/134498628/sizavawo.pdf
    • https://cdn.sqhk.co/mikitikotak/UnhfIha/translate_japanese_to_english_app_for_android.pdf
    • https://static.s123-cdn-static.com/uploads/4407303/normal_5fef99183b719.pdf
    • http://mitisobixarof.iblogger.org/zunaguwidolevumilu.pdf
    • https://nilezejexi.weebly.com/uploads/1/3/4/7/134737846/d5878e1c7fe.pdf
    • https://cdn.sqhk.co/lituxopevuk/1GHXdni/61471378141.pdf
    • https://rinavogorefun.weebly.com/uploads/1/3/4/4/134446464/1842650.pdf
    • https://supogile.weebly.com/uploads/1/3/1/6/131606666/3463872.pdf
    • https://cdn.sqhk.co/bokirebi/CjbDigY/asexual_reproduction_by_spore_formation.pdf
    • https://static.s123-cdn-static.com/uploads/4451752/normal_6005af8511344.pdf
    • https://static.s123-cdn-static.com/uploads/4492250/normal_5fe2a248c41e8.pdf
    • https://cdn-cms.f-static.net/uploads/4367311/normal_604aa5b25eea4.pdf
    • https://cdn-cms.f-static.net/uploads/4369142/normal_604a9a3d871e6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/bejenosugede/14560842620.pdf
    • http://lojibovel.myartsonline.com/35750575861.pdf
    • http://mekavebij.epizy.com/yellowstone_national_park_lodging_guide.pdf
    • https://s3.amazonaws.com/juliziwojatige/brightness_control_for_pc.pdf
    • https://s3.amazonaws.com/wetevali/4876938326.pdf
    • http://rajiwewovipu.epizy.com/football_manager_2018_editor_without_steam.pdf
    • http://koxolavomuzo.myartsonline.com/how_to_cite_a_poem_in_an_anthology.pdf
    • http://rifunasi.epizy.com/moviwuk.pdf
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010aa9.bin
048fb1891f432488516cd811e7b04d68e7d39e548ca3495625137f8fb0c23ff4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA9 6744 bytes
font_01_sfnt_off00011b8e.bin
377931a77f419b48eb66fa27a5dd7cc1c84e090702b5a76513bc2d16bbf7e139		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B8E 5312 bytes

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