Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ffbe1ca597f972a…

MALICIOUS

PDF

80.1 KB Created: 2021-09-21 22:48:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 36adb77965ba6278fd316c2448fc3799 SHA-1: 69e97a85338f98f9734692478068b10ae1789483 SHA-256: 7ffbe1ca597f972ae2edca218c98f80af31e0776fd64800c30b0241aa9308872
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

This PDF contains embedded JavaScript and numerous external links, many pointing to compromised websites or disposable hosting, indicating a phishing or malware distribution attempt. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests the document's primary purpose is to trick the user into opening a password-protected archive, likely containing a secondary payload. ClamAV detection further confirms its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://yakutiaprime.ru/SITE/files/editor/file/sidit.pdf In PDF document text
    • https://avflash.nl/upload/files/70357564674.pdfIn PDF document text
    • http://guss-ex.de/uploads/fck/file/gofurekoxeketerusomavo.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614188c0c9952---61052895707.pdfIn PDF document text
    • http://l-max.ru/userfiles/file/sezamazepef.pdfIn PDF document text
    • https://ritascreation.com/userfiles/file/92978242422.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/30d46f59f531e90b4b2e6297ec1382d1/dipizomumelewutinatoto.pdfIn PDF document text
    • https://ikuseikyokai.jp/ckmedia/files/69870392693.pdfIn PDF document text
    • https://ises.ca/phpsites/vertical_living/uploads/file/95897755618.pdfIn PDF document text
    • https://godparents4tz.org/home/god/public_html/ckfinder/userfiles/files/48658756659.pdfIn PDF document text
    • https://777mto.com/contents/files/zobupusopotex.pdfIn PDF document text
    • http://ourpreferred.com/userfiles/files/57815576533.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/16148bf851a5b4---46503969151.pdfIn PDF document text
    • http://speakingaboutnetworking.com/ckfinder/userfiles/files/gunatosarudal.pdfIn PDF document text
    • https://guruvinodji.com/Userfiles/file/bukupege.pdfIn PDF document text
    • http://cinebuzz.be/uploads/userfiles/files/74889856127.pdfIn PDF document text
    • http://1night2daytour.com/ckupload/files/zefes.pdfIn PDF document text
    • https://www.shamshabaddiocese.org/files/js/ckfinder/userfiles/files/24700664785.pdfIn PDF document text
    • https://iqrainternationalschool.org/_assets/files/82953134469.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/k7thj1srb1hgk7o663e4mkngbo/89680004057.pdfIn PDF document text
    • http://www.sauminandy.com/fckimages/file/zebisonufuxurutoxuradi.pdfIn PDF document text
    • http://shopgraeagle.com/ckeditor/uploads/files/32316865567.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=sblocco+smartphone+androidPDF 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_off0000d031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD031 18620 bytes
SHA-256: 00ae5b2cd8cc4f744f0a907f30f37ab640e96af3c821d0d76aadaae3c05edd14
font_01_sfnt_off0001007d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1007D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011894.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11894 10996 bytes
SHA-256: 10f184c1357688dbf856faa1460b0ba6ad127ef163956952b923d329e6ab5918

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