Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed79f4fb7632a991…

MALICIOUS

PDF

69.5 KB Created: 2021-09-02 20:33:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 647259ec83bf0d10efea4739f44e8383 SHA-1: 26f3f913aa21ef52962c42469770102af4bd7114 SHA-256: ed79f4fb7632a991db5882f292015fd47eea84f6816a305a3d1da6b1a37b2f3e
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded URLs, many of which point to compromised WordPress sites or disposable domains. This structure is characteristic of a link farm designed to distribute malicious content or facilitate phishing attacks. The ClamAV detection further supports its malicious nature, identifying it as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4539

Heuristics 5

  • 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
  • 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://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160e48656c74ec---48537602018.pdf In PDF document text
    • https://ludifrance.fr/userfiles/file/texigojirudulununis.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b60f5564850---tusab.pdfIn PDF document text
    • http://93564497.com/userfiles/9099379890.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/a176aa9745d58e8a4225bdba01280649/7728079216.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aea54b3c87d---kikufulipipapela.pdfIn PDF document text
    • https://noddy.nu/images/file/maxipejumewegut.pdfIn PDF document text
    • http://bettynblue.com/upload/fck_img/20210717/file/jesorutokavuge.pdfIn PDF document text
    • http://oreade-breche.fr/userfiles/file/vizojerafetasak.pdfIn PDF document text
    • http://yogaschoolofkerala.com/photos/editor/files/98460725822.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608d293dd15e1---35610922854.pdfIn PDF document text
    • http://a-mega.ua/images/uploads/file/rubuzijidoj.pdfIn PDF document text
    • http://zeminyerkaplama.com/upload/ckfinder/files/91476494249.pdfIn PDF document text
    • http://hotararicedo.ro/files/files/tefowim.pdfIn PDF document text
    • https://drticket.ir/basefile/drtiketcom/files/46381571311.pdfIn PDF document text
    • http://gramercy-grand.ru/files/file/31331688789.pdfIn PDF document text
    • http://zentrumok.com/userfile/files/timogegimusakufomasadup.pdfIn PDF document text
    • http://grhs1983.com/clients/72571/File/kojexumawizokudivosu.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/jhc2evmchm97epqforcgln19o5/14855276028.pdfIn PDF document text
    • https://juraganmonyet.com/contents//files/30661341033.pdfIn PDF document text
    • https://brs.jo/userfiles/files/41051334837.pdfIn PDF document text
    • http://www.thunderesp.com/ckfinder/ckfinder.htmlfiles/sijaxelej.pdfIn PDF document text
    • https://www.northwoodmedical.ca/wp-content/plugins/super-forms/uploads/php/files/b9sapedb8bvfm9c0ovji3k4mfe/vogibuwugetivakazigujebul.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/16089809491498---32741676621.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=class+10+lifelines+of+national+economy+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD023 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e835.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE835 16952 bytes
SHA-256: 2159fb8513b2cb266ec0bc1685b85004e395d2a76dc8a464e038bb54f2b989a2

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