Malicious PDF — malware analysis report

Static analysis result for SHA-256 29e0c2c783f6e486…

MALICIOUS

PDF

67.9 KB Created: 2021-10-01 12:54:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 5241b83198f12fe3b9d37fef0dc2d1b4 SHA-1: c22126eddf05228509fcd130d5f453e8d1012cf2 SHA-256: 29e0c2c783f6e486a3637fac9a9f5bbca64797f318cfb8c90b1febb680f37c72
184 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous links, many pointing to compromised CMS uploads or disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. The embedded JavaScript likely serves to execute further malicious actions or redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 http://windowsplusllc.com/ckfinder/userfiles/files/roxizuduvekelikugoloje.pdf In PDF document text
    • https://lecormier-menuiserie.com/www/upload/files/26964792929.pdfIn PDF document text
    • https://ruiguoex.com/upfile/files/2021/09/23/45913700104.pdfIn PDF document text
    • http://indianapit.thriftstorewebsites.net/flash/indianapit.thriftstorewebsites.net/file/68801127725.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1612ff7638f145---82074284849.pdfIn PDF document text
    • https://ventadeterrenosurbanos.com/userfiles/file/joxeje.pdfIn PDF document text
    • http://closehorses.com/userfiles/file/niboxewelegivi.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614d893eb8deb---nokirelokux.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1615142f9cd194---dotilov.pdfIn PDF document text
    • https://newegys.egyseg.eu/ckfinder/userfiles/files/wudof.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/161558877b5565---kifiwubopezoxazez.pdfIn PDF document text
    • https://mandarinusa.com/userfiles/file/1631541289.pdfIn PDF document text
    • https://bulgariapools.com/contents/files/10691000106.pdfIn PDF document text
    • http://bellamy.tw/uploads/files/202110010335063494.pdfIn PDF document text
    • https://sukienmiennam.com/userupload/files/pelojujefimeviri.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1614b85387372a---96966793035.pdfIn PDF document text
    • http://www.ville-civaux.fr/admin/js/ckfinder/userfiles/files/sovozovi.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/1446e6287cfd3a48542e5cd713a47ae5/bojuwelufuka.pdfIn PDF document text
    • http://union-montage.pl/userfiles/file/fujijad.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614879687abaa---20228386709.pdfIn PDF document text
    • http://www.tempshift.com/app/webroot/files/uploadimagesfile/pefilugupajilegi.pdfIn PDF document text
    • http://baovephuongtroi.com/vietkiendo/upload/file/49017108451.pdfIn PDF document text
    • http://gelateriacool.it/userfiles/files/39018275085.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1614d269902af4---81297499250.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=year+7+shapes+worksheetsPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000af2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF2A 10320 bytes
SHA-256: bdaf9b3450b89e4d99b3eec62841b50be7a0f499b286124749c3766e83417235
font_01_sfnt_off0000c6b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6B8 13848 bytes
SHA-256: 4fd82aab6fa777cfe3b0013c8e000bec61f9f01840920681b1cbf8a0f270d053
font_02_sfnt_off0000e8c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1