Malicious PDF — malware analysis report

Static analysis result for SHA-256 094e025e8a268b23…

MALICIOUS

PDF

68.4 KB Created: 2021-09-26 21:50:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 4e29409999588d781b19e22559f08d6e SHA-1: 22e9078d19d98ad1d34ec2e19ad4820ab3324ec9 SHA-256: 094e025e8a268b230979429e1fa197346e1d3777500970f5d989f1c60139ee9e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, forming a link farm. The presence of embedded JavaScript and a high ML classifier score indicate malicious intent, likely to redirect users to phishing sites or download further malware. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • 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://irlanc.ru/uplcv?utm_term=dragon+raja+mod+apk+download PDF link annotation
    • http://alompar.hu/uploads/content_files/files/xanuvudove.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/161466ec356e50---notozofunulilopaboxuwosa.pdfIn PDF document text
    • https://glamweddingdesign.com/userfiles/file/tamoresolanekawo.pdfIn PDF document text
    • http://grubstreet.ca/ckfinder/userfiles/files/42235990697.pdfIn PDF document text
    • http://koreabulk.net/userData/board/file/15652409187.pdfIn PDF document text
    • https://moraure.net/js/ckfinder/userfiles/files/kisipavakosapado.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/ogkbleuq2937epjmfj87clrr35/bozebuzo.pdfIn PDF document text
    • http://househouse.it/userfiles/files/gavoguwik.pdfIn PDF document text
    • https://wemservice.com/ckfinder/userfiles/files/37664709213.pdfIn PDF document text
    • http://etasystem.net/userfiles/files/topij.pdfIn PDF document text
    • http://snieznik.pl/userfiles/file/gukedov.pdfIn PDF document text
    • https://halkum.rs/files/mokojep.pdfIn PDF document text
    • https://martensmgt.com/business_school/uploads/file/senaladefiteditev.pdfIn PDF document text
    • https://sanipacific.com/attachment/file/rikagirejusobokipomob.pdfIn PDF document text
    • https://pmms-online.com/assets/file/donumifidufejiwuxaz.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161324dab84d64---rabobasuwezesexu.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/983b35938c06715b2f4a111e57bdb769/luzuwogig.pdfIn PDF document text
    • http://telegid.tv/userfiles/files/89785978574.pdfIn PDF document text
    • https://alusol-kw.com/ckfinder/userfiles/files/tumavefijetopewozeg.pdfIn PDF document text
    • http://fge-service.com/userfiles/file/28544551707.pdfIn PDF document text
    • http://studioschicchi.eu/userfiles/files/wifujexotuxolu.pdfIn PDF document text
    • https://haltia.mx/sii/ckfinder/userfiles/files/lerufixofuwuxasuluze.pdfIn PDF document text
    • http://alhegazgroup.com/userfiles/file/ketiba.pdfIn PDF document text
    • http://maslatalaia.com/userfiles/file/39476534189.pdfIn PDF document text
    • https://attackworkoutprogram.com/app/webroot/files/ckfinder/userfiles/files/26755613582.pdfIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b06b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB06B 10552 bytes
SHA-256: 1d477027b4d2983fa4a35da666bf606a0a5ae317ee365ef695d9c3dede96729a
font_01_sfnt_off0000c83c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC83C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e04e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE04E 14452 bytes
SHA-256: 526173d1e6af6b516892b50497897d415df6dbfabd692b983c5c13c40fbaa302

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