Malicious PDF — malware analysis report

Static analysis result for SHA-256 119203c2c29383ac…

MALICIOUS

PDF

94.3 KB Created: 2021-10-06 02:59:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f637bd9ebbd4403ea5e6e32c31fd7fcd SHA-1: f2d7d6d4f27e3821bbea83a29bec1197aacde265 SHA-256: 119203c2c29383ac274c0b6f7057c41a9b02527966a10c895811eacd23c74d23
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of numerous embedded URLs, many pointing to PDF files on various domains, suggests a link farm designed to host or redirect to malicious content. The 'SE_DOWNLOAD_BUTTON' heuristic further supports the idea that the document is designed to trick users into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9726

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://metricgroup.it/uploads/file/punebe.pdf In PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16152a315c98f5---45325763420.pdfIn PDF document text
    • http://kingsap.com/file_media/file_image/file/laber.pdfIn PDF document text
    • http://sewakendragroup.com/userfiles/file/maminorivafi.pdfIn PDF document text
    • http://lawyergz.net/uploadfile/files/bufigulafetipex.pdfIn PDF document text
    • http://xingyeknitting.com/userfiles/files/topujafagetopekiwav.pdfIn PDF document text
    • https://vidaleve.ind.br/ckfinder/userfiles/files/50781262624.pdfIn PDF document text
    • http://tsraccountants.nl/mailing/images/photo/file/buwaxeletaxexiraz.pdfIn PDF document text
    • http://jdjcnc.com/upfolder/e/files/20210914123437.pdfIn PDF document text
    • http://peaceinsrilanka.lk/ckfinder/userfiles/files/71971305568.pdfIn PDF document text
    • http://felixefontesadvogados.com.br/ckfinder/userfiles/files/tulitew.pdfIn PDF document text
    • https://tenekedjieva.com/uploads/file/jowugaraxeminuzaxiza.pdfIn PDF document text
    • https://wickedcheesy.com/images/file/nebiwulebaditeb.pdfIn PDF document text
    • https://pushtypathshala.com/demo/aims/files/images/files/17082864395.pdfIn PDF document text
    • https://kemxoithanhhang.vn/app/webroot/files/images/pages/files/bosavaxobug.pdfIn PDF document text
    • http://karate-talence.com/newsite/userfiles/files/kixalusebipu.pdfIn PDF document text
    • http://webinaris.eu/ckfinder/userfiles/publics/files/noteniwofowuluven.pdfIn PDF document text
    • https://deltagroup.bg/uploads/file/54597531727.pdfIn PDF document text
    • https://gimenezricarte-deltabogados.com/ckfinder/userfiles/files/katijewup.pdfIn PDF document text
    • http://gloria-eurex.com/images/blog/file/16542266377.pdfIn PDF document text
    • http://resheto.ru/users_images/fck/file/venujedipuleb.pdfIn PDF document text
    • http://bbmpva.nl/fckassets/file/nakag.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/1612eeffdb7634---67538541052.pdfIn PDF document text
    • https://gencatakan.com/upload/file/9524510517.pdfIn PDF document text
    • http://ideviceplus.nl/app/webroot/files/userfiles/files/rotifizusebawewafuba.pdfIn PDF document text
    • https://akrmedia.no/ckfinder/userfiles/files/53602320021.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=gnm+1st+year+question+paperPDF link annotation
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0001539b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1539B 16668 bytes
SHA-256: 6d08800b0736f2391037722e4c6772258e41b8ca8d20cac51f83e6a764eb07f7
font_00_sfnt_off0000e7a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A4 22652 bytes
SHA-256: 6fa3035f9e61885618510609f879ff866b162121643b3243245a8e59f07589aa
font_01_sfnt_off0001227a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1227A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013a91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A91 10816 bytes
SHA-256: dee1466d951fa38f33236e551f499492bedb130cdbaa8611a12159e988a84ae6

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