Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a9b0d2c1af666b4…

MALICIOUS

PDF

83.7 KB Created: 2021-09-15 12:10:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 07eb82b0df205005965c44233ac81d42 SHA-1: 92581ee7d768302c8257c63c8a898bec170e273a SHA-256: 7a9b0d2c1af666b4f134cf151213ad43b0c9ca8e3ef376928304def0de20dafc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised CMS upload storage and disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs are likely part of this lure, directing users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bff916e2ee---59034575829.pdf In PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c689519abe---82166738745.pdfIn PDF document text
    • http://soleilboo.com/images/uploads/files/fujobujawu.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/795414854.pdfIn PDF document text
    • http://thesnowmanicecream.com/ckfinder/userfiles/files/botowizijepuwifopajixosu.pdfIn PDF document text
    • http://trustarshida.co/cache/fck_files/file/nodaviziv.pdfIn PDF document text
    • http://islenapuntos.com/campannas/file/65002479817.pdfIn PDF document text
    • http://tcsm62.org/uploads/news/file/73576930644.pdfIn PDF document text
    • http://lovesenergy.nl/file/42067185767.pdfIn PDF document text
    • http://wideanglepackaging.com/ckfinder/userfiles/files/kexuzepevinasuzadazofa.pdfIn PDF document text
    • https://akvaguru.hu/user/file/93405294986.pdfIn PDF document text
    • https://invest.pl/userfiles/file/karovopijojiro.pdfIn PDF document text
    • https://fenixfalt.com/userfiles/file/55870370292.pdfIn PDF document text
    • http://newgrids.com/userfiles/file/34110508715.pdfIn PDF document text
    • http://resheto.ru/users_images/fck/file/xuripaxevaxalomozupemowov.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/16137adfcaedb4---juruzojotejajakezuxefub.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/ec086ac12262df0579c071099a68df0e/118681629.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/43b9d456c1362c2007dbfc57b20252c5/86867694087.pdfIn PDF document text
    • http://kondicionery-shodnya.ru/upload_picture/file/24051629502.pdfIn PDF document text
    • http://greenglobepms.com/uploads/gaxadufugirupuwoxeked.pdfIn PDF document text
    • http://terwaarde.be/ckfinder/userfiles/files/66485105510.pdfIn PDF document text
    • http://gavinlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fesujuxefuxoxedixomoz.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613819e2830cc---bolisorobilexokinaresot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=then+came+you+castPDF 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_off0000e18d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE18D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f99f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF99F 18708 bytes
SHA-256: 9361c40f10c0180c4900703ee0b451ab72b8e06fb6d2500e45341df051bbf0b7
font_02_sfnt_off000129da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129DA 10436 bytes
SHA-256: 260649a632f47867a8ca27042a404ba6f1b438ddfe7d9e4bff006a1114207c02

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