Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ff0d9b6a8a37d91…

MALICIOUS

PDF

119.2 KB Created: 2021-08-16 06:24:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: c1add476fec3873c52b5302d536790a1 SHA-1: 550ea33893f4b84a622225d426e941c777ab7d8d SHA-256: 2ff0d9b6a8a37d91c22f369c2ad7104483fa60a2b42afe2cebd7f227cf24f121
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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
  • 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.
  • 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://oniceh.ru/uplcv?utm_term=guitar+hero+3+custom+songs+download+pc PDF link annotation
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfcffc9af7---lazazogeninomibeja.pdfIn PDF document text
    • http://demirlermetal.com/resimler/files/vuvebemutew.pdfIn PDF document text
    • http://nuestratierrapremios.com/campannas/file/37069273735.pdfIn PDF document text
    • https://vietfun.com.vn/wp-content/plugins/super-forms/uploads/php/files/ccljb9j35bg2alj18q4e7afhoa/guzose.pdfIn PDF document text
    • http://pxmonastery.org/CKEdit/upload/files/zojufelidumamosipabefuti.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160aac864adb97---zagujenusizafaliku.pdfIn PDF document text
    • http://nktrading.qa/file/files/bebinomobupokel.pdfIn PDF document text
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/85u57jn00p5hqtq7js4pfiiagv/vugexesokapefefo.pdfIn PDF document text
    • http://boathousebrokerage.com/userfiles/file/61169971161.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16086d5c6201af---37713442611.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c32eda1547b---98161069550.pdfIn PDF document text
    • http://asiadomainstore.com/userfiles/file/zamobogokezelob.pdfIn PDF document text
    • https://livre-art.com/ckfinder/userfiles/files/fexakurawosuluwolo.pdfIn PDF document text
    • http://presssimayeshahr.ir/pic/file/853180314.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/4e9b7f2123ac2bf42e14f78a1a2481bb/34472440363.pdfIn PDF document text
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/2c2eeff40ec7c28c5134be22e6ffc1be/kakazeralitelipelin.pdfIn PDF document text
    • http://petukmahaaaraj.com/userfiles/file/nadawevajut.pdfIn PDF document text
    • http://alexanderkanevskyartgallery.com/clientMedia/file/60184506807.pdfIn PDF document text
    • http://cn-daomeng.com/upload/userfiles/files/53f63eabb5caf163c8c541425d380753.pdfIn PDF document text
    • http://thaoduocvn.com/userfiles/image/file/xenipozezaruvuzetu.pdfIn PDF document text
    • http://china-zzld.com/uploadfile/file///2021061107144421.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/8es3gspjqpd7963ct8jufoklp7/67811683416.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608df4879c31e---paledevujiwoxexa.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087b5527fe07---90278669408.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/3893389263051ebbb9d4b55fed6705b0/49199273188.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_off00016be6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16BE6 17928 bytes
SHA-256: 694366e6db5e4cbdbe4e28b3c42ba8ef41f41bb265455876b57093c1333ddde1
font_01_sfnt_off00019b86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19B86 11356 bytes
SHA-256: e490d53caee2c6a1473d250bb8b96261ad9364aaaaeff0dccc146adb043e3823
font_02_sfnt_off0001b5ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B5FF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1