Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6d52253653d201d…

MALICIOUS

PDF

69.6 KB Created: 2021-01-23 13:24:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8ebb60924c7237cf852263afe1bfade SHA-1: 59671a73600403def3b8e51c5ab02a8cac912447 SHA-256: c6d52253653d201d61303ab01a43e19d58013b6ad8068dbb378403f61217cf2b
66 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged as a link farm. The ML classifier strongly indicates maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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
  • 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://trafftec.ru/123?utm_term=ka+uluwehi+o+ke+kai+hula
    • https://cdn-cms.f-static.net/uploads/4461207/normal_5fd8f298cbbc2.pdf
    • https://site-1172155.mozfiles.com/files/1172155/4950099298.pdf
    • https://site-1168494.mozfiles.com/files/1168494/moketi.pdf
    • https://site-1176402.mozfiles.com/files/1176402/santorini_miami_beach_restaurant.pdf
    • https://static.s123-cdn-static.com/uploads/4403264/normal_5feb0f63f0343.pdf
    • https://static.s123-cdn-static.com/uploads/4403804/normal_5ff97e3b1899b.pdf
    • https://womiridiwudawap.weebly.com/uploads/1/3/1/4/131408248/8335908.pdf
    • https://zixobidepupakog.weebly.com/uploads/1/3/4/5/134503699/fuvemogikad.pdf
    • https://static.s123-cdn-static.com/uploads/4418972/normal_5fceed5abbd8b.pdf
    • https://kurepisafigovu.weebly.com/uploads/1/3/1/3/131398088/4f91c44.pdf
    • https://site-1178370.mozfiles.com/files/1178370/balaam_wood_new_uniform.pdf
    • https://site-1166725.mozfiles.com/files/1166725/gonokikudisija.pdf
    • https://cdn-cms.f-static.net/uploads/4455894/normal_5fdaaf3acd826.pdf
    • https://mibuvenatevuwo.weebly.com/uploads/1/3/4/6/134607329/xadajed.pdf
    • https://site-1172238.mozfiles.com/files/1172238/niwodon.pdf
    • https://static.s123-cdn-static.com/uploads/4417208/normal_6007b11bef1d9.pdf
    • https://tivofexogi.weebly.com/uploads/1/3/1/3/131398075/6070999.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kidojudal.epizy.com/investigation_report_example_pnp.pdf
    • http://kokibitumoxa.epizy.com/magnesium_ribbon_experiment_lab_report.pdf
    • http://nazifaba.rf.gd/100_answered_prayer.pdf
    • http://dobejul.epizy.com/zejilijowuzoserurewo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bfbe.bin
906e1905c520a7275e27dafeb2f4b2892573924f3f171ea04e85ec46b83b91ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBFBE 4624 bytes
font_01_sfnt_off0000cf87.bin
68920adc70ac8dbb542f180da03e6faa66fc43db76ceeafb4317d977af11b898		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF87 11064 bytes
font_02_sfnt_off0000f3dc.bin
4d6819832c82b08b9ce7c706b5cb98ac46ced7cbb743301eca90489f0e3e1710		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3DC 16148 bytes

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