Malicious PDF — malware analysis report

Static analysis result for SHA-256 08f2f099b06ba192…

MALICIOUS

PDF

84.3 KB Created: 2021-04-05 03:31:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 37b3d05c805608601c5c09ccf6b38304 SHA-1: 6aa01f0a88b38a4c9faecd405366f20fc3883195 SHA-256: 08f2f099b06ba1920c28bb025fcffcfd556a473d588bd4a464fb0e703e7ac0a6
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Weebly and other free hosting services, indicative of a link farm or SEO manipulation tactic. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. The embedded URLs suggest an attempt to redirect users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://nipisod.ru/strik?utm_term=how+to+measure+voltage+in+series+and+parallel+circuits
    • https://sazalilo.weebly.com/uploads/1/3/4/5/134592982/sibefomulokujakole.pdf
    • http://xugejanakumeder.iblogger.org/pogivusunofunetavex.pdf
    • https://vinunawamezod.weebly.com/uploads/1/3/1/3/131380031/5263042.pdf
    • https://jebezijako.weebly.com/uploads/1/3/5/9/135964749/d66102921.pdf
    • https://cdn-cms.f-static.net/uploads/4421062/normal_6045140c4ee8b.pdf
    • https://nelajelax.weebly.com/uploads/1/3/2/7/132712676/gagigugeram_tiluforakozura_lilifixaguz_jevule.pdf
    • https://wolapegod.weebly.com/uploads/1/3/0/7/130776073/040afdf2.pdf
    • https://cdn-cms.f-static.net/uploads/4373753/normal_600acb074caac.pdf
    • https://fofomakizu.weebly.com/uploads/1/3/0/7/130775640/befumapejobow-lugemufinewemu-vabilifojoraraw-maseg.pdf
    • https://jipofaxinevafud.weebly.com/uploads/1/3/4/3/134350183/nalumi.pdf
    • https://tidovikazixuwuj.weebly.com/uploads/1/3/4/3/134316919/dulidobagetosum.pdf
    • https://fuselenedirila.weebly.com/uploads/1/3/4/5/134597682/8800e128972e7.pdf
    • https://cdn-cms.f-static.net/uploads/4391649/normal_60222ef04cea3.pdf
    • https://nawawedivoxoni.weebly.com/uploads/1/3/4/7/134719505/7b6b4e0d0.pdf
    • https://cdn-cms.f-static.net/uploads/4382192/normal_6066398567afd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jaxudemavi.epizy.com/biblia_hebraica_stuttgartensia_de_estudio_en_espaol.pdf
    • http://jorowubibe.epizy.com/school_administration_definition.pdf
    • https://3bcdeb60-9876-4d14-bc0a-1dd1632c647c.filesusr.com/ugd/16a96a_62d94759f48849308593ebb31915e874.pdf?index=true
    • http://risawanidav.epizy.com/xunipojesifowener.pdf
    • https://151dec52-cf20-477b-a401-a68195eead79.filesusr.com/ugd/8538f4_4bdd1f2e8cf94fbfa37f8bc909445d08.pdf?index=true
    • https://ef4b221f-cfb4-47e8-bf1d-3b5092770df7.filesusr.com/ugd/4948da_249d4909da7f4775a0115575e5d62ac9.pdf?index=true
    • 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_off00010989.bin
8db713c87c3e0e5ddf86c733be85ea96a5d58a85046a13b291d94c7775868d76		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10989 5504 bytes
font_01_sfnt_off00011c3d.bin
5afe21522c145a4aa4ffcd55566ae00b027d77cc6e2ee7143879290e21c2fea2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C3D 11528 bytes

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