Malicious PDF — malware analysis report

Static analysis result for SHA-256 749b354de49b2592…

MALICIOUS

PDF

88.8 KB Created: 2021-06-30 10:21:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 670cf4ee93e825fdcd8e4cc09d8921bf SHA-1: 1b901169a51fe7d503a59eaaf6903552d791176a SHA-256: 749b354de49b25928a033796828e279c215034df86e5c3f895823836e649e625
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites. These links are likely intended to lure users to malicious destinations, potentially for phishing or to download further malware. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://synerhu.ru/uplcv?utm_term=rootless+pixel+launcher+icon+pack
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5757525d85---51175975041.pdf
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072b1207d6f9---97984016654.pdf
    • http://srsheicha.com/uploadfile/file/84701998606.pdf
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160a2bef22f43f---7542260981.pdf
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/f3eb17f248ff2578348b91bcb681eafb/duzebi.pdf
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160928b4f360ce---17345682940.pdf
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9c26f75ec313431417bf4c9bc958ce1c/kosevojuzeme.pdf
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160743d1f93cd7---xibeles.pdf
    • http://rentaruedas.com/files/others/tazaxawubolafefad.pdf
    • https://bursac.net/userfiles/file/19692767837.pdf
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/69d0a17c9cf83fc3526bee78a3be0f4c/54736986182.pdf
    • https://bloomland.com/sites/bloomland.com/files/49826197121.pdf
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/7d2c86a8ebe8955fae4f2908a4853b66/49977056942.pdf
    • http://wksystems.net/HotelEstimator/userfiles/file/17289922479.pdf
    • https://parklanehotel.asia/userfiles/file/famasemewupugawibek.pdf
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/e3330296af6d2e62531ae027bcf6f110/botisomukotoviw.pdf
    • http://augustaelectricalwork.com/editorData/file/paferuvivejomi.pdf
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160ad12e7c723b---xawezexo.pdf
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/9c6980cec50471596017035df8eb9146/85707142615.pdf
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/k3npcfba5gr8otm66n5513je77/fevazetilifuxegagivuma.pdf
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb0f192e9c---tajumusodamatas.pdf
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/vf8fe763hpd1ej7umns3bqmgi5/jevutatob.pdf
    • http://sixtyguildersresearch.com/admin/photos/file/94410970700.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f46d.bin
343e2a7f729e97cfb154d2a68452a4149095dc4995e7205b907241cde3e30d22
pdf-font-stream PDF embedded font (sfnt) at offset 0xF46D 18328 bytes
font_01_sfnt_off000124e3.bin
2346484a354d471aa2beaf858799aafd9b5195781f6baee06e5abff60fc69684
pdf-font-stream PDF embedded font (sfnt) at offset 0x124E3 10812 bytes
font_02_sfnt_off00013dd7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13DD7 16792 bytes