Malicious PDF — malware analysis report

Static analysis result for SHA-256 62dd080b0601a556…

MALICIOUS

PDF

68.7 KB Created: 2021-09-27 19:01:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: bf1ef62a50bb486563c9ea594b2ad880 SHA-1: a91acbe902b95cca8ecde7e7a9c59cfab1d2c933 SHA-256: 62dd080b0601a55648aa3a68f16c53dfc4d1f0289cec7b98a2ef1af5f45b1e13
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its image-only nature and embedded clickable links. Heuristics indicate it's a link farm pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious content. The ML classifier and ClamAV detection strongly support its malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://kondicionery-pushkino.ru/upload_picture/file/51444153203.pdf In PDF document text
    • http://zima.italie-ubytovani.cz/data/file/zitubeda.pdfIn PDF document text
    • https://mcsfood.com/images/file/manaxemuvirezugut.pdfIn PDF document text
    • https://thegioidongphuc.net/ckfinder/userfiles/files/pegibarejeja.pdfIn PDF document text
    • https://mlmrockstars.com/ckfinder/userfiles/files/60187315829.pdfIn PDF document text
    • http://sinocelltech.com/filespath/files/20210909201414.pdfIn PDF document text
    • http://charivne.info/images/file/83776084660.pdfIn PDF document text
    • http://cyc.cz/pictures/clanky/files/77386101065.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615186e0cfcfb---7060488147.pdfIn PDF document text
    • http://es-manzokudou.com/yamituki-n/uploads/files/vidadomuxelumijob.pdfIn PDF document text
    • http://www.alborada.es/ckfinder/userfiles/files/55578681789.pdfIn PDF document text
    • http://litho-and-co.fr/ckeditor/upload/files/demefobilakor.pdfIn PDF document text
    • http://sintellect.ru/Repository/file/vexebamaxas.pdfIn PDF document text
    • http://lapmaymn.samdigroup.vn/app/webroot/upload/files/wogexim.pdfIn PDF document text
    • https://zniczekowalczyk.com/user_images/file/papexosigirepujibeludo.pdfIn PDF document text
    • http://windowsplusllc.com/ckfinder/userfiles/files/97609334996.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/0c325dbaa05d607d7ce3b12104d35e2a/79565694498.pdfIn PDF document text
    • http://trans-serwis.com/userfiles/file/52224389962.pdfIn PDF document text
    • http://tcsklife.com/filespath/files/20210908005324.pdfIn PDF document text
    • http://ricarda-allegra.de/userfiles/file/27269577772.pdfIn PDF document text
    • http://gabortech.com/admin/file/jebavipagerimelagenerejuv.pdfIn PDF document text
    • https://atasuorganiktarim.com/upload/ckfinder/files/39279791952.pdfIn PDF document text
    • http://jnejendomsdrift.dk/userfiles/file/tivitagopalajelimo.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614851a7b6818---pisoburazamunomax.pdfIn PDF document text
    • http://tercovci.cz/files/file/zifis.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=hd+streamz+apk+for+pc+downloadPDF 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_off0000b069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB069 14152 bytes
SHA-256: 623d341f2cd8af7d661c97af18c39f6eb78b873baf26afe2bf76186ed660aa87
font_01_sfnt_off0000d3ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3ED 10916 bytes
SHA-256: efc3d4d47bb465a2ddd6114df80b3c07db71646b8fe5ce8bbec8a50ac3ac1299
font_02_sfnt_off0000ed46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED46 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1