Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2697d29e9c7cfd8…

MALICIOUS

PDF

68.9 KB Created: 2021-09-07 17:26:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: efce52f9425ab727fb21c9bf86c7300b SHA-1: 208365c684f6892940aebc658acf642e5511f789 SHA-256: f2697d29e9c7cfd894b536287ca9a62ae73d99c49f6f1efafbddd32a6cc45201
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristic analysis revealed it functions as a link farm, with numerous embedded URLs pointing to potentially compromised or disposable domains. These links are likely intended to lure users to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/ih9a1mc4gc77cep0ujlnolrem1/24788072392.pdf In PDF document text
    • https://aquafilling.com/userfiles/file/losuwikomilewapos.pdfIn PDF document text
    • http://soleilboo.com/images/uploads/files/88923952742.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/9n41esk6eimc6r0gp86ccpi0nj/pamefogogekem.pdfIn PDF document text
    • http://chiengthai.com/file_media/file_image/file/4974943224.pdfIn PDF document text
    • http://rlponder.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/65314403745.pdfIn PDF document text
    • http://amdind.com/userfiles/file/zidikanagikel.pdfIn PDF document text
    • https://toolsatool.com/userfiles/files/7816744017.pdfIn PDF document text
    • https://handinhand-daycare.com/ckfinder/userfiles/files/38457392700.pdfIn PDF document text
    • http://www.w.radeton.cz/ckfinder/userfiles/files/53255368910.pdfIn PDF document text
    • https://artbynela.com/uploads/file/77215245433.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/4i788efp9289ddba67bc6c88ol/90313018215.pdfIn PDF document text
    • http://nitecoreromania.ro/files/file/55435229668.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c0f73448c4---kopevajowejob.pdfIn PDF document text
    • https://romalasergroup.com/userfiles/files/68666364488.pdfIn PDF document text
    • http://xinxinhouseware.com/uploadfile/files/vajan.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/14508054713.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087ef9b51b15---96312676886.pdfIn PDF document text
    • http://alpha-cp.com/userfiles/file/pusin.pdfIn PDF document text
    • http://holidayinntorino.com/userfiles/files/61782387924.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/file/58154477244.pdfIn PDF document text
    • http://hataylezzeti.com/resimler/files/10908828836.pdfIn PDF document text
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/2ba529a33bc10bcb95c8257471c79525/vaxebugotilegag.pdfIn PDF document text
    • https://airflow-skateboards.com/userfiles/files/takezujosexokeguzepipasiz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=hepatitis+alkoholik+adalah+pdfPDF 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_off0000b285.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB285 10472 bytes
SHA-256: 08e4f4d072623928b04b95d2bb9d04d579824be97d15b943b37efed9a9b2e276
font_01_sfnt_off0000ca62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA62 14448 bytes
SHA-256: b8ef882c36b8c8884fa5cfe4fe3f2e1b9aa07f67ea52922fcf70feb1be237220
font_02_sfnt_off0000ee47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE47 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1