Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3749c183fd7fafc…

MALICIOUS

PDF

89.9 KB Created: 2021-08-27 19:38:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 6ea4fc199a302eb5b959d078a3ac5ba7 SHA-1: b11cc6c4e61c2e5a76ea1bbbda5dac424dbc3f7b SHA-256: c3749c183fd7fafc90e11c64d2b03cde5e2d8de7528e31407ded3c07bda08aec
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://guijek.com/userfiles/file/dagivezorobi.pdf In PDF document text
    • https://tecnibat.net/uploads/archivos/tuzobamupumoxasobivi.pdfIn PDF document text
    • http://eatatrudy.com/uploads/files/katefumisexoboniziposedi.pdfIn PDF document text
    • http://smwiarus.pl/ckfinder/userfiles/files/10279706737.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071cb966294a---xoxasunobe.pdfIn PDF document text
    • http://myblindz.com/fck_user_files/file/13323546983.pdfIn PDF document text
    • http://nuestratierrapremios.com/campannas/file/66190856197.pdfIn PDF document text
    • http://www.sosonomo.com/ckfinder/userfiles/files/rametorenidebiwelot.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/1itgdo8b0pn58v4dsdrl0rrae0/gozijavuduxeferivarupo.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/acqhnk364t28ddk0cb8t6huq47/95117323440.pdfIn PDF document text
    • https://clubforeducation.com/FCKeditor/userfiles/file/73852620069.pdfIn PDF document text
    • http://pnmanagementsolutions.in/uploads/78710702290.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/tfb8gvh65o2rs03b27hj6gnjkl/lotutinomuluzogameviwefot.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dabd2e3ef58---68833654004.pdfIn PDF document text
    • https://oglethorpeclub.org/~oglethor/UserFiles/file/243866749.pdfIn PDF document text
    • http://mtcnx.com/upload/fckimagesfile/fomiwa.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1606caf7c7db5a---zogavopixazo.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16103046e95645---karumuxaxebilirijawa.pdfIn PDF document text
    • http://szsahsh.com/uploads/files/kafedekapi.pdfIn PDF document text
    • http://novussiteyonetimi.com/uploads/file/porerelojepibozizutude.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/585bd9eb689980e330b1ded88f6bef84/kugenenat.pdfIn PDF document text
    • https://iva-vietnam.com/userfiles/file/kewadiwodabivog.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160f38350c71d7---10660581583.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=scrolling+meaning+in+bengaliPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA82 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e299.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE299 10524 bytes
SHA-256: 24029133c06df094fb10faf064c4e5e864e67b8be66f55b010eb520280192937
font_02_sfnt_off0000fa7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA7B 16452 bytes
SHA-256: 5c10f0f783bf74c48da2cb7208013b0e7cdc3a32bf9f1c9a729f6165b8019f4d
font_03_sfnt_off0001112e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1112E 23444 bytes
SHA-256: bc485a8fb82cba35a83f965e840cfa5724483d70a49697c614a1e8c4d00fa537
font_04_sfnt_off00014d1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D1D 2772 bytes
SHA-256: 1536a8d4c6cd02b55aa33afdb97f0158ef09777cd118d91625aed7a79f409fc4

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