Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1005902a2460a2b…

MALICIOUS

PDF

78.5 KB Created: 2021-09-18 00:50:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d3912c0c7e01f60d558b27d7d0b69a6f SHA-1: 201b45d2e66eb802e3ca5f8a4d13156c58e66860 SHA-256: d1005902a2460a2b44a7a585ccb1b1cb245a21183c6472f45538dc9fbd20397e
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery through these links. The presence of 'utm_term' in one URL suggests tracking or campaign-related activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • 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.
  • 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://pixomot.ru/uplcv?utm_term=samsung+galaxy+j1+ace+custom+rom+download PDF link annotation
    • http://netdepphunu.vn/images/userfiles/file/vosetuxewo.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1614505f78ec21---fatalibamokafugu.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1613d75ac2783a---68954325618.pdfIn PDF document text
    • https://nsck-cykelmotion.dk/userfiles/file/jidefofi.pdfIn PDF document text
    • http://bancasemecanino.com/userfiles/files/wutozol.pdfIn PDF document text
    • https://bcm.es/files/galeria/files/68749842572.pdfIn PDF document text
    • http://metafelix.it/userfiles/files/17995338144.pdfIn PDF document text
    • http://xatrbio.com/userfiles/file/wipefigavupuxowozini.pdfIn PDF document text
    • https://careersourcechipola.com/files/public/zuxepijuzanin.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/161355f4b9a765---paperedifogemikawatuneled.pdfIn PDF document text
    • http://6nergy.fr/6nergy/sites/default/user/file/27424761.pdfIn PDF document text
    • http://rhondachem.com/d/files/38198249665.pdfIn PDF document text
    • https://amursvoidom.ru/media/files/semimokava.pdfIn PDF document text
    • https://tagoproperties.com/ckfinder/userfiles/files/5150338437.pdfIn PDF document text
    • http://nhatngungoisaoxanh.com/upload/files/zaropopelomir.pdfIn PDF document text
    • https://hgb.se/filer/file/zogeba.pdfIn PDF document text
    • http://artospace.com/pics/file/89485709409.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_off0000cc69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC69 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e47b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE47B 17552 bytes
SHA-256: f6cfc9f27b8d32efc06d02713f1105af41e9638ea8be6f17b94fbd11f039d141
font_02_sfnt_off00011227.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11227 11280 bytes
SHA-256: e976287eb1f706d043173d37da484c6ca9a9e2f29a6dcd705b846917e1552e03

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