Malicious PDF — malware analysis report

Static analysis result for SHA-256 135c61fdf3b7ff48…

MALICIOUS

PDF

122.3 KB Created: 2021-04-21 21:10:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: aef0bb2d487f233b28ce4f8ccd2d18a5 SHA-1: 29093dd07bdb7cc22c7f09f64b81d021aa11f0af SHA-256: 135c61fdf3b7ff48567aff96c635ff16038ef3d5685809f183132b6c6bdd8ab7
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many of which point to disposable domains and are part of a link farm strategy, suggesting an attempt to redirect users to malicious content. The document body, though heavily obfuscated, contains keywords related to 'thermodynamics and kinetics in materials science', likely serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
  • 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://nipisod.ru/strik?utm_term=thermodynamics+and+kinetics+in+materials+science PDF link annotation
    • http://masajsalonunuz.com/how_to_root_samsung_galaxy_tab_4_sm-t330nufmltz.pdfIn PDF document text
    • http://grenkasalo4.xyz/lozipurogobejiwasifudukuw6ttb.pdfIn PDF document text
    • http://savadaqwe.space/zubekuwiguqt4b.pdfIn PDF document text
    • http://ziwusis.getenjoyment.net/how_to_reset_my_kenmore_microwave.pdfIn PDF document text
    • https://xapenivivafozeb.weebly.com/uploads/1/3/1/3/131379266/f79053ac9cb643.pdfIn PDF document text
    • http://najelipopusivut.getenjoyment.net/53732539314.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502268/normal_5fd971ef94fb3.pdfIn PDF document text
    • http://copyrighthelpcentral.com/apowersoft_editor_fullb46tj.pdfIn PDF document text
    • https://zevuvizaxetu.weebly.com/uploads/1/3/4/8/134887967/tuvelitedodupeda.pdfIn PDF document text
    • http://good-production17.site/fegubimodegiteronikuzecqan0.pdfIn PDF document text
    • http://piriveva.scienceontheweb.net/bhagavad_gita_700_slokas_in_telugu.pdfIn PDF document text
    • https://firunonosud.weebly.com/uploads/1/3/6/0/136052948/peginuxorazetow-vapenuwejalibom.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413983/normal_5fdd0c9f81f57.pdfIn PDF document text
    • http://daliadiago.com/sole_e25_vs_e35_2019fqi8j.pdfIn PDF document text
    • https://wemezixogasowed.weebly.com/uploads/1/3/1/6/131637562/cc7299917d.pdfIn PDF document text
    • http://henrysavbr.site/kemikedejobumatevt1da6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452169/normal_605a235bed3e0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1618b3f4-dcc0-4047-a816-eeb1cbe43c51.filesusr.com/ugd/a01749_d5ee69e8048546378a53a02c6634c619.pdf?index=trueIn PDF document text
    • https://af6bd0e1-9fb2-4c52-b6e5-df6188d17e94.filesusr.com/ugd/771d18_62e487f141fe4abba26bcdef90d388d5.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001742a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1742A 2952 bytes
SHA-256: 6cb1d0bd15748b161a2ded9cfcfbf1befbc9d2e430301dcc2c73d38ab589abee
font_01_sfnt_off00017eb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17EB4 5296 bytes
SHA-256: d1218c8b04aad4abc84e1b065e59dd5463f947202e05657a678233d1034bf016
font_02_sfnt_off0001908d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1908D 14720 bytes
SHA-256: 1f65f81af323c2acbc826e700467725e3da1b52e5c97aad6e777b46c35e88041
font_03_sfnt_off0001c25c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C25C 16644 bytes
SHA-256: 93d9ec38289160bfcae04ec4fac2c9226e7ad89297b3c3bc3b8a86fad224cc6d

Open this report in the interactive analyzer, or submit your own file for analysis.