Malicious PDF — malware analysis report

Static analysis result for SHA-256 f22de0c50234c4e1…

MALICIOUS

PDF

80.5 KB Created: 2021-09-20 12:27:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e386937204bad4814e33f46e195f0bc7 SHA-1: c2f3a5c1b43314d1f3de2f75399522ffe08c19bf SHA-256: f22de0c50234c4e1a1cf9804faf26461f25932fb839dd36d5ce53e64f4ad55ef
184 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple external URIs, indicating an attempt to redirect the user to malicious websites. Heuristics suggest it's a link farm on disposable hosting and points to compromised CMS uploads, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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 https://chcial.ru/uplcv?utm_term=doc+scanner+mod+apk PDF link annotation
    • http://hrjok.com/uploadfile/file/67827252589.pdfIn PDF document text
    • http://www.alcera.ca/userfiles/file/fuzozituzoremuzugenabemi.pdfIn PDF document text
    • http://rosabaum.de/web/editor/files/75656897967.pdfIn PDF document text
    • https://culturasiapamplona.com/guiarte_userfiles/files/zuvapibe.pdfIn PDF document text
    • http://montex.pro/uploads/userfiles/file/28062417581.pdfIn PDF document text
    • http://nhatminhtrading.vn/app/webroot/uploads/files/39933468719.pdfIn PDF document text
    • http://transportdiverse.com/uploads/files/wufopexuw.pdfIn PDF document text
    • http://carshopm.com/js/upload/files/zadosokojola.pdfIn PDF document text
    • http://spprp.pl/userfiles/file/malimine.pdfIn PDF document text
    • https://takarasushimn.com/userfiles/files/57088613282.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130b5c7689b7---zizonoran.pdfIn PDF document text
    • http://czerwoneiczarne.pl/files/file/1980378875.pdfIn PDF document text
    • http://nawoo.net/userData/board/file/ranaxiwutubepir.pdfIn PDF document text
    • https://newegys.egyseg.eu/ckfinder/userfiles/files/liputobaliki.pdfIn PDF document text
    • https://estduquebec.com/scripts/php/xenocode/lib/ckfinder/userfiles/files/46293925938.pdfIn PDF document text
    • http://starma.pl/files/file/kunepepaziwekatenezegir.pdfIn PDF document text
    • https://treasurehunterdetectors.com/ckfinder/userfiles/files/47244099306.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/oa2p4ummkq8liganknq5e206mj/10019616604.pdfIn PDF document text
    • https://eminentland.com/admin/userfiles/files/wopiwufimidaked.pdfIn PDF document text
    • https://interior-mark.com/ckfinder/userfiles/files/vitivuxafosuvodopaxi.pdfIn PDF document text
    • http://mehmetrasimmutlu.com/icerik/file/1136903150.pdfIn PDF document text
    • https://sunriseinnjasper.com/nbloom/fckuploads/file/mugarixugilebavuvawukax.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/ed6c1c1682884aa9b846123ab9ca604e/firogezew.pdfIn PDF document text
    • http://matras-devison.ru/upload/file/xabinebafujas.pdfIn PDF document text
    • https://pilot-nav.com/ckfinder/userfiles/files/70428998898.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_off0000d75c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD75C 17536 bytes
SHA-256: 25026826e128a3f564fe55b0639e2f61b3d578d08cc58282e07ec1b07fd1915e
font_01_sfnt_off000104f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104F1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011d08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D08 10532 bytes
SHA-256: 972289881174bd75c623c1ea8d57251dbfb8961a37e1e4a2bb9f9aa85d261e19

Open this report in the interactive analyzer, or submit your own file for analysis.