Malicious PDF — malware analysis report

Static analysis result for SHA-256 399ea05cb4d71fa4…

MALICIOUS

PDF

86.3 KB Created: 2021-09-20 10:31:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 1e79d66a9082690bf918102dce013879 SHA-1: edff7381c483c095b377c08d7c94f55aa84dc0ca SHA-256: 399ea05cb4d71fa41830f4e83b9fdedbd9647ee4b49a6f78f686dbb8e1a88270
156 Risk Score

Malware Insights

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

The PDF file contains numerous links pointing to various websites, many of which are hosted on compromised or disposable domains. This behavior is characteristic of a link farm designed to lure users to potentially malicious sites for phishing or malware downloads. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/161347c0d25a8a---morigibadu.pdf In PDF document text
    • http://allefrgycg.news-read.com/upload/files/48469331325.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/3346cbc27f07460c376419ac43885d4c/65808413539.pdfIn PDF document text
    • http://hakanhurdacilik.com/userfiles/file/puserawo.pdfIn PDF document text
    • http://lavalnerina.it/userfiles/file/bunojabatepiw.pdfIn PDF document text
    • http://tbeaindia.com/userfiles/file/4424719231.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/161444c2dcde15---lupolel.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/98734103377.pdfIn PDF document text
    • http://www.dereformasenalicante.com/archivos/files/kemujazufakegabixizusef.pdfIn PDF document text
    • http://puginternational.com/ckfinder/userfiles/files/miworupilekojusedorel.pdfIn PDF document text
    • http://sushinamu.com/uploads/files/33038622678.pdfIn PDF document text
    • http://mosme.org/uploadfile/files/wemukaxon.pdfIn PDF document text
    • http://jurabos.nl/include/editor/file/relepunolowevojadev.pdfIn PDF document text
    • https://datawire.gr/files/files/puridikiz.pdfIn PDF document text
    • http://www.gdchgs.com/admin/img/files/85314626079.pdfIn PDF document text
    • http://dostavkaturov.ru/files/file/pazamubal.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136cb5155988---49440904615.pdfIn PDF document text
    • http://veoguidecostarica.com/ci/userfiles/files/51791515742.pdfIn PDF document text
    • http://kriosispl.com/cote_dor_import/admin/ckfinder/userfiles/files/28031969103.pdfIn PDF document text
    • http://hijoin.hu/editor_up/21991153673.pdfIn PDF document text
    • http://lavalnerina.com/userfiles/file/nudojudasebetikufot.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16132f017810fb---68130761827.pdfIn PDF document text
    • http://imobilestore.de/userfiles/file/41464383908.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/kdg2gcd1fuh4jqe65umic0lc7k/lusemomavotexozajofonotu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=mp3+editing+app+for+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_off0000ee96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE96 17180 bytes
SHA-256: 73665e80ee58188788871a34664135669934434727cff8d93200167a186bfdc9
font_01_sfnt_off00011aed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013304.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13304 10624 bytes
SHA-256: accdf12ea0bb185fc84210d7789a7991a766336a8cdcb153fb11e04507123728

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