Malicious PDF — malware analysis report

Static analysis result for SHA-256 9822739b319bde65…

MALICIOUS

PDF

82.0 KB Created: 2021-09-17 17:33:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 5ec65f28f027ba666b5a387a45e91b14 SHA-1: e22b054fc538db0591a84575268826c2388611aa SHA-256: 9822739b319bde65098604234990f3d39f9fd2cdc9acd7d477a6212121c7943f
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to deliver malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://faresaldabbous.com/uploads/files/20617106655.pdf In PDF document text
    • http://eyela.kr/uploadfile/fckeditor/file/fexujudusatelasuxu.pdfIn PDF document text
    • https://eyescare.vn/app/webroot/upload/ckfinder/files/dubiwujoxuwo.pdfIn PDF document text
    • http://winhazel.com/indigo/ckfinder/userfiles/files/92977866379.pdfIn PDF document text
    • http://nazycakes.com/userfiles/file/notogixolab.pdfIn PDF document text
    • http://ambulatorioveterinariorigolon.eu/userfiles/files/20535657148.pdfIn PDF document text
    • https://snoman.mb.ca/ckfinder/userfiles/files/95347471309.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/ee583227eb055b6e94244420334ae763/xinuru.pdfIn PDF document text
    • http://doudou.tw/userfiles/files/75038681020.pdfIn PDF document text
    • https://nikosdimos.gr/userfiles/file/79467913154.pdfIn PDF document text
    • http://villaelen.it/userfiles/files/53658332698.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137310fd38e8---74154197743.pdfIn PDF document text
    • http://swaptoys.org/ckeditor/uploads/files/xesufodi.pdfIn PDF document text
    • http://dietgame.net/admin/fckeditor/data/file/20210905162508.pdfIn PDF document text
    • http://kkagro.com/media/images/upload/file/xamasexedowape.pdfIn PDF document text
    • https://snoman.mb.ca/ckfinder/userfiles/files/15531469858.pdfIn PDF document text
    • http://sinoorchids.com/image/file/pubabapuna.pdfIn PDF document text
    • http://rebeccafantarchitetto.it/userfiles/files/79455128694.pdfIn PDF document text
    • http://lnv-cnc.com/userfiles/file/notuzag.pdfIn PDF document text
    • http://singer-island-condos.com/userfiles/files/62022268002.pdfIn PDF document text
    • http://icsbc.ru/fuploader/file/bufatoposu.pdfIn PDF document text
    • http://giadinhmedia.com/uploads/files/tasedakosisuxokobovemejes.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/161380ef8f3097---xolizejufakikav.pdfIn PDF document text
    • http://bluebirdcanada.com/FileData/ckfinder/files/20210906_26DA659122065C55.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=free+qr+code+scanner+websitePDF 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_off0000ddb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDB0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f5c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C7 10668 bytes
SHA-256: a95fa996cfb30fbf44578d7443a9eec80c6b7a2521d294b7f6b0b5af1c2b8f74
font_02_sfnt_off00010e2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E2F 17112 bytes
SHA-256: fc7b1b0bf783318fcb7d45c014dc0e58d3ad69a4915252dbef11db1fb66ae83a

Open this report in the interactive analyzer, or submit your own file for analysis.