Malicious PDF — malware analysis report

Static analysis result for SHA-256 82ce4b9a91c6596e…

MALICIOUS

PDF

69.7 KB Created: 2021-09-13 11:37:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 46a072ee1efc48bf031767d8e25fca8f SHA-1: 0ddb07968814908818fcb39dc6cf9ac631c4357c SHA-256: 82ce4b9a91c6596eb94441e418737722730f29e462c011be08f2e3a5837b62c8
170 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is a PDF file containing embedded JavaScript, which is a common technique for executing malicious code. The JavaScript likely redirects the user to a series of URLs hosted on compromised WordPress sites, forming a link farm. This behavior is indicative of a phishing or malware distribution campaign, aiming to lure victims to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6717

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.
  • JavaScript action low 1 related finding PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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
  • 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 http://worldsocialistpartyindia.org/ckfinder/userfiles/files/moruxeduzetuw.pdf In PDF document text
    • http://dragonspond.com/uploads/files/45678873071.pdfIn PDF document text
    • http://vers-ma.de/userfiles/file/53664036889.pdfIn PDF document text
    • https://cliniquemyo.com/userfiles/file/74300449858.pdfIn PDF document text
    • https://cukimentescukraszda.hu/files/files/76036784843.pdfIn PDF document text
    • http://toyteepee.com/uploadfiles/file/21090112315154580271vikl.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134db0b73083---60927972295.pdfIn PDF document text
    • http://www.amedna.com/userfiles/files/gunobolijarovitotup.pdfIn PDF document text
    • http://kelt.pl/userfiles/file/31320505033.pdfIn PDF document text
    • http://szamosiszerviz.hu/feltoltott/files/libuludag.pdfIn PDF document text
    • https://www.bankkartya.hu/js/ckfinder/userfiles/files/54069416354.pdfIn PDF document text
    • http://saveursetsavoirs.fr/image/file/3584838289.pdfIn PDF document text
    • http://www.maderas-navarro.com/ckfinder/userfiles/files/jokememilodalikotuf.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/904c063e93d9104db6208bc9d87cf04e/97807575764.pdfIn PDF document text
    • http://hotel-gerard-dalsace.com/upload/document/35944378059.pdfIn PDF document text
    • http://fundacjaproartis.pl/javascript/ckfinder/userfiles/files/suvewimuzif.pdfIn PDF document text
    • http://torgoborud.org/images/file/danak.pdfIn PDF document text
    • http://ride-on-earth.com/images/blog/file/73889900154.pdfIn PDF document text
    • http://yuemeism.com/uploadfiles/files/todagavonuzipaxodenaxis.pdfIn PDF document text
    • https://twinslock.com/ckfinder/userfiles/files/17052152711.pdfIn PDF document text
    • https://hamasataccessories.com/userfiles/files/51208399029.pdfIn PDF document text
    • https://fivetc.net/uploads/files/tinubikawanopigevimavi.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fdd56e4d4a---dobebekibovasorew.pdfIn PDF document text
    • http://klimagra.pl/images/wysiwyg_img/file/84636284860.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=tonsils+and+adenoids+function+in+immune+systemPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e677.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE677 10712 bytes
SHA-256: 6af99adba5100f338ef77aae99f4bc70585686fdd3a2ddde9bdcab4d94c4fa28

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