Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d743d65ac850d24…

MALICIOUS

PDF

85.9 KB Created: 2021-08-21 23:17:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f09dfdeb6fc15a6743365ae27dee7613 SHA-1: aed903239085451b47c174314b0c3efbeffc9e6f SHA-256: 1d743d65ac850d24122dd72a3bc5d7844d79f5479c33c27cae9503075b7de2f6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many hosted on compromised CMS platforms, designed to trick users into downloading files. The presence of a link farm and the ML classifier's high confidence score indicate a phishing or malware distribution attempt. Although no scripts were directly extracted, the PDF structure and embedded links suggest an intent to deliver a malicious payload, likely a second-stage downloader.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af998a2c91f---vobitel.pdf In PDF document text
    • http://tcurryproperties.com/konadnew/userfiles/file/toxirif.pdfIn PDF document text
    • http://cartopack.com/Images/file/pabax.pdfIn PDF document text
    • https://fulzugaskozpont.hu/files/86398356882.pdfIn PDF document text
    • http://arqing.es/ckfinder/userfiles/files/79761220144.pdfIn PDF document text
    • http://pnmanagementsolutions.in/uploads/24496155008.pdfIn PDF document text
    • http://tjsijiqing.com/ckfinder/userfiles/files/2021/0603/c6d4fb204225347c37fffc508d0395b6.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/160778fec9244e---zenazovulilakurekat.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/0f3a9777e7d520440831f0310f87bffe/75510908761.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f86a427003---fikun.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4705f816ab---29354258250.pdfIn PDF document text
    • http://fmafirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/46333360097.pdfIn PDF document text
    • http://superplasticizer.cn/d/files/sikoluzitiwak.pdfIn PDF document text
    • http://nextgenship.net/upload/file/20210723162704428342.pdfIn PDF document text
    • http://xhiehchin.com/Xhieh_News/_file/siduzaxo.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160798a7c6c33f---87784419629.pdfIn PDF document text
    • http://ecole-belair.com/ecole/file/sobapinuwevopebe.pdfIn PDF document text
    • https://imagebeaute.fr/userfiles/file/xezetalelokagirodij.pdfIn PDF document text
    • http://goldnumber.info/userfiles/file/96375390807.pdfIn PDF document text
    • https://nguyenvanhuongloc.vn/app/webroot/files/images/pages/files/wefupaxolex.pdfIn PDF document text
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/9c626927dce0fddc9f8131a5aa493f23/5474560343.pdfIn PDF document text
    • http://bloomx.com/sites/all/sites/bloomx.com/files/33272036087.pdfIn PDF document text
    • https://bawwabatrizq.com/userfiles/file/70941911120.pdfIn PDF document text
    • http://parzenica-bialka.pl/userfiles/files/zapejifirekupujosewonu.pdfIn PDF document text
    • http://medica-eg.com/userfiles/file/radux.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=hack+for+among+us+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_off0000e9f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001020c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1020C 10912 bytes
SHA-256: dcde32d4397e25409e3c9f1a6bb0d39d3f19c975fc28695a795caef28a1cf4c3
font_02_sfnt_off00011b25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B25 16868 bytes
SHA-256: 5f67cddb5463610f2a9935afa01380569528268a63b5cc5c06de9a8a5252659f