Malicious PDF — malware analysis report

Static analysis result for SHA-256 61d6c0895d3f03b9…

MALICIOUS

PDF

83.1 KB Created: 2021-08-03 00:49:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: dcff89a790a7d1ccb2d48ffc00b5056b SHA-1: 275a6844c0b2f6c41e331845a355f4da769129c0 SHA-256: 61d6c0895d3f03b9e407f4c688080cafc85d778f0258e70e7320c13e9fcfeb03
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/ff98a3d6b90da37dd13d13e925ce1b8a/2496013211.pdf In PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/09aec8a2009f25c38894bc344d3e80de/39523451726.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ace05bae220---7018467757.pdfIn PDF document text
    • https://susta.vn/userfiles/file/82805668281.pdfIn PDF document text
    • http://speaklifeiamgreatness.com/files/files/81955754537.pdfIn PDF document text
    • https://anfauglir.com/images/file/97505470153.pdfIn PDF document text
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/mh8mj800oem39r0lsom48poh6m/tepodalirofiduvazujisuto.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160959437df150---jovogavakejike.pdfIn PDF document text
    • http://lossfundraisingevent.com/clients/f/f5/f5ed5e364f2f51aa46a4c5982fab9a07/File/waluviwululo.pdfIn PDF document text
    • http://thaoduocvn.com/userfiles/image/file/jitipegumozorodikuluboz.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/2r8j80jt52f96h7t495fs3cgjh/nebuduvuxezozexi.pdfIn PDF document text
    • http://mebelhotel.ru/userfiles/files/purudojukawogazodu.pdfIn PDF document text
    • https://hostingyuvasi.com/calisma2/files/uploads/22225553383.pdfIn PDF document text
    • https://www.alapan.org/fckimages/file/85194428314.pdfIn PDF document text
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ef60eada10---56080235520.pdfIn PDF document text
    • http://imhyuk.com/imhyukeditor/userfile/file/dizodizaw.pdfIn PDF document text
    • http://wingprocess.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/60975167944.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160edae6799b36---dubavafepama.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/wajomit.pdfIn PDF document text
    • http://winfielddeli.com/ckfinder/userfiles/files/44007294475.pdfIn PDF document text
    • http://muzeumostrowiec.pl/obrazy/file/10651492251.pdfIn PDF document text
    • http://imhyuk.com/imhyukeditor/userfile/file/79367404261.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/a7bdf6c6204f0c963c802e03a0845dc4/vitanozuwafukobi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=el+vuelo+del+aguila+libro+pdf+gratisPDF 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_off0000dcb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCB6 10860 bytes
SHA-256: 52d1402cb1e8e0413a22a27c7b3316006a75cf4890e4d7c35f822d69fd74119b
font_01_sfnt_off0000f576.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF576 18864 bytes
SHA-256: 47f760fdd13d1bed00c80aca24bd19cb02ff69f31ea526c028b1479aa42b25d3
font_02_sfnt_off00012576.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12576 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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