Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d4bba192b8b4470…

MALICIOUS

PDF

101.2 KB Created: 2021-06-30 05:54:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a5d03fdcecefad8cec7be4683b1cc03f SHA-1: d60867749766fce2558ae91ccf1d974c5f630bb1 SHA-256: 9d4bba192b8b447050f0fefbf1b449c30a2acf74c62970d3b8fc87de5e501546
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised CMS uploads and disposable hosting, indicating a link farm designed to redirect users to malicious sites. ClamAV and ML classifiers strongly indicate malicious intent, with the document likely serving as a lure for phishing or malware delivery. No scripts were extracted, but the heuristic findings are sufficient to assess the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9938

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://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/2si6avdb0rct0ha3s05am6n3s5/vonokubagi.pdf In PDF document text
    • http://gibisch.org/files/files/18296452718.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d11646e724---bejozerexix.pdfIn PDF document text
    • http://dungcucaytrong.com/images/files/lewigagubarajowoma.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/ugs3hb9065glk0n52hmkkp0sp6/libonajulobemibenexevu.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/d66b2e5567d3b54ad3eba019bbd159fb/61902391554.pdfIn PDF document text
    • https://anfauglir.com/images/file/satamifibadadukebofa.pdfIn PDF document text
    • http://cameralehiep.com/hinhanh_fckeditor/file/lowimarewimugukuwajara.pdfIn PDF document text
    • http://movitecnic.com/ressource/site-image/files/81644175532.pdfIn PDF document text
    • https://khangle.vn/uploads/images/files/xenesipajenupute.pdfIn PDF document text
    • http://firewheels.pe/userfiles/file/32103665156.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/16070baa15f1a7---wevexowane.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd5f717f3cd---mimalosekofivobek.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d316baafd6---muxepi.pdfIn PDF document text
    • http://qunjl.com/userfiles/files/lavaketapimuja.pdfIn PDF document text
    • https://apoiotelecom.com/imagens/img_fckeditor/file/todozalevoki.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607f6faa91943---bupoxidekuzu.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160af83f3ee43c---5414093690.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/2hf3sfcndaqtt5qjs1f69rs26b/fenote.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/176ibegps83fuc6aa93qd3as9c/kunelufora.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b34e6bdb8a---vanizilulipeg.pdfIn PDF document text
    • https://doucetplasticsurgery.com/ckfinder/userfiles/files/5739656472.pdfIn PDF document text
    • https://keralatemples.info/ckfinder/userfiles/files/3556614089.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=die+antwoord+discography+torrentPDF 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_off00011350.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11350 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012b62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B62 25960 bytes
SHA-256: 74b77739122d7a1391b83bc9ec85c1b77f22eda91f13fe666c3efae5542145b8
font_02_sfnt_off00016c18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C18 10948 bytes
SHA-256: 1398f2e07eb98475ead5da76ac06612b3dbd74cfdb1540c9155e00f8823f6dd3

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