Malicious PDF — malware analysis report

Static analysis result for SHA-256 baa826b3550be153…

MALICIOUS

PDF

76.1 KB Created: 2021-09-08 20:54:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 32828f1ba7cddb242ec3d47887c283ac SHA-1: 7344594d614e4e1140d92262091478999edc1090 SHA-256: baa826b3550be153c9a77649af0444b020cc751881fa149e3a7a01e3977e26a5
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7561

Heuristics 5

  • 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
  • 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://smidgel.ru/uplcv?utm_term=java+convert+pdf+to+html+pdfbox PDF link annotation
    • http://word.mn/uploads/assets/94508959399.pdfIn PDF document text
    • http://websteravelandscaping.com/editorData/file/lifemuvunenepoxotunukawip.pdfIn PDF document text
    • https://bandai-k.com/userfiles/file/pasinutedanebis.pdfIn PDF document text
    • https://efnnma.org/files/file/38804526866.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f7b828b104---zomepameses.pdfIn PDF document text
    • http://wsm.hk/images/files/30570969053.pdfIn PDF document text
    • http://koreabulk.net/userData/board/file/jizamarudelu.pdfIn PDF document text
    • https://transport-vehicules.fr/userfiles/file/gotuzosokufatese.pdfIn PDF document text
    • http://alisawedding.com/upload/users/files/37942273578.pdfIn PDF document text
    • http://bjxbw.cn/userfiles/file/nazuraxegij.pdfIn PDF document text
    • https://hrmconsulting.biz/upload/files/16935293367.pdfIn PDF document text
    • https://bi-kiesabbau.de/cmsimple/images/file/73224758445.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f41bcd800d---xaxekejorukufixuzoxexorag.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/d93a44eff15a1c3036bc9ebe0c5342c6/solopuwinixujusebiwodelij.pdfIn PDF document text
    • http://dongamold.com/fckeditor/upload_files/file/51352043728.pdfIn PDF document text
    • http://nyett.hk/uploads/news/files/bazumeduledavuninag.pdfIn PDF document text
    • https://thingstodobahrain.net/ckfinder/userfiles/files/wabipor.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613586eb524bc---90061287807.pdfIn PDF document text
    • http://grandviewgroupresort.com/upload/files/94547061736.pdfIn PDF document text
    • https://milorem-service.ru/userfiles/file/35320931049.pdfIn PDF document text
    • http://snieznik.pl/userfiles/file/28032334891.pdfIn PDF document text
    • http://gsemilia.it/userfiles/files/kibor.pdfIn PDF document text
    • https://unitedpetexpress.unitedreloth.com/ckfinder/userfiles/files/vuziniximimonof.pdfIn PDF document text
    • https://xn--b8qxb801j.tw/upload/files/gokovilorawiwukufulul.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e34f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE34F 17220 bytes
SHA-256: dfdc99246db56c2c3e6ac11772c2822c9ca2755e4aebb2bd63d59d08c42b3ed9
font_01_sfnt_off000110ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110AD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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