Malicious PDF — malware analysis report

Static analysis result for SHA-256 c10e1cca573af893…

MALICIOUS

PDF

74.9 KB Created: 2022-05-26 09:55:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2022-07-15
MD5: 49b75488526b0853ede3608ac7c09390 SHA-1: a004f71a33f941324f9ed24178de2a0978f69108 SHA-256: c10e1cca573af893da946d63663429b6491fad13bce6d738bc70b0ea3a4df2b0
164 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment T1566.002 Spearphishing Link

The PDF contains embedded JavaScript and a significant number of external links, indicating a malicious intent to redirect users to potentially harmful websites. The 'PDF_SEO_LINK_FARM' heuristic strongly suggests this is a tactic to distribute malware or conduct phishing. ClamAV also detected this file as a 'Pdf.Phishing.Trojan'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • 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
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://tevav.co.za/YmrXLWy8?keyword=missing%20411%20off%20the%20grid%20pdf%20free%20online%20free
    • https://bugedosase.weebly.com/uploads/1/3/2/7/132712019/df9cd5d1e5f.pdf
    • https://fuxupetuvifa.weebly.com/uploads/1/3/5/2/135298555/a9b3a5a7d.pdf
    • https://juwomazitebuden.weebly.com/uploads/1/3/1/4/131414743/9864799.pdf
    • http://shop-cartuning.pl/userfiles/file/97199603565.pdf
    • https://xefefukolur.weebly.com/uploads/1/4/1/8/141866352/4580641.pdf
    • https://nopuxerul.weebly.com/uploads/1/4/1/5/141514765/wedefizise-nojijarodejot-dadinerizeg.pdf
    • http://viacaosaopedro.com/www/js/ckfinder/userfiles/files/6714878066.pdf
    • https://korvioinfotech.com/ckfinder/userfiles/files/19211818929.pdf
    • https://kalendarz.probik.pl/fckeditor/userfiles/file/93729414856.pdf
    • https://ligexuvuzi.weebly.com/uploads/1/3/0/8/130814340/gugagelez_nedavodasepifoj_tokoxumita.pdf
    • https://xosenevofas.weebly.com/uploads/1/3/5/3/135324499/4512021.pdf
    • https://gerivelizozil.weebly.com/uploads/1/3/4/1/134131902/dasaxataxorowuziw.pdf
    • https://topisijek.weebly.com/uploads/1/3/7/5/137512828/mifelapazako_gomoxujedo_fefujasali_xasesefidifusu.pdf
    • https://tajujarosoko.weebly.com/uploads/1/3/4/7/134749081/544144.pdf
    • https://nimomobef.weebly.com/uploads/1/3/4/4/134458394/zafek.pdf
    • https://tujilebofali.weebly.com/uploads/1/3/5/3/135398949/5094731.pdf
    • https://jidobatixinel.weebly.com/uploads/1/3/4/7/134726111/cb8e37a8245.pdf
    • http://africanhairbraidingsalon.com/userfiles/file/vuvefumefajulexidemupoke.pdf
    • https://xidoferowugefu.weebly.com/uploads/1/3/4/3/134348033/vugiz.pdf
    • https://kigodebilak.weebly.com/uploads/1/3/5/2/135297846/9675739.pdf
    • https://kavezebox.weebly.com/uploads/1/3/0/8/130814004/wopul-fepopujurenib-lomubosu-kozonoborapa.pdf
    • https://kexejimeso.weebly.com/uploads/1/3/4/0/134096016/831164.pdf
    • https://ferakatetimof.weebly.com/uploads/1/3/4/4/134470639/6296133.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://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_off0000c0e7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC0E7 16792 bytes
font_01_sfnt_off0000d8f9.bin
3b78bc2ebd19c006da84d86588abc88f5845366bf32a5f320c339ee219a17f8c
pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F9 17012 bytes
font_02_sfnt_off0001053d.bin
8bfd6c03d8e039ec9f39dcbb9a0d5d05ba7fe8c77ee7e550be7ac3fb0f625429
pdf-font-stream PDF embedded font (sfnt) at offset 0x1053D 10740 bytes