Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cc46ca4bcd49b21…

MALICIOUS

PDF

103.3 KB Created: 2021-08-02 16:16:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: e9e6c8ca5665102912b181aef7c9e5a6 SHA-1: 251786657ae5af253e8b552e265c9b9e6faf78d6 SHA-256: 7cc46ca4bcd49b2136ba67e3cdc8a1f170d538d0ffcc9a0c5e27cb429789575e
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://drisraadentalcenter.com/userfiles/file/menavumitenanuxo.pdf In PDF document text
    • http://weberstellen.ch/userfiles/file/xejobawe.pdfIn PDF document text
    • https://stopserv.ru/files/file/5528293089.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/161050af1c2f16---44100720808.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c994b322e3c---lizopodavadomubinuva.pdfIn PDF document text
    • http://newgrids.com/userfiles/file/69498934045.pdfIn PDF document text
    • http://thietbimaugiao.vn/Images_upload/files/kigaxositexevokugelafo.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/593369808d5ae1657553487b69850cb8/82791391545.pdfIn PDF document text
    • http://www.introspekta.si/ckfinder/ckeditor_uploaded_files/files/95461650575.pdfIn PDF document text
    • https://www.spitalmoldovanoua.ro/ckfinder/userfiles/files/99233398194.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160871dcc0ab39---45860685958.pdfIn PDF document text
    • https://zakarpattya-tour.com/upload/sesojemajagisadepo.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/97bdef3491af81447b3b77bfd41938dd/wosunujegusufipo.pdfIn PDF document text
    • http://1night2daytour.com/ckupload/files/zejixikimeruwizevobese.pdfIn PDF document text
    • https://n-v-v.dk/userfiles/file/47941144310.pdfIn PDF document text
    • https://tatsolarlight.com/uploads/files/susenajadusa.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a8361902b1---gujirotovapuzar.pdfIn PDF document text
    • http://pressvaluation.net/userfiles/file/87698389202.pdfIn PDF document text
    • http://scheidenschiedam.nl/uploads//file/28509849677.pdfIn PDF document text
    • http://ambulatorioveterinarioilghirlandaio.it/userfiles/files/93514251119.pdfIn PDF document text
    • http://pcwenhua.com/uploadimg/file/16223687571664000451.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/kevodukudib.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/ed72229cbe47b6abef236845eaa5c71b/56332824551.pdfIn PDF document text
    • http://sushi-belovo.ru/files/32828072676.pdfIn PDF document text
    • https://asset-books.com/userfiles/file/74911528011.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=el+poder+de+la+palabra+de+dios+para+transformar+vidasPDF 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_off00012c4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C4A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001445c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1445C 18296 bytes
SHA-256: 3c3279405622891b15b162cc190fd4babb0bb2443e7e5829d3117d7b632240bd
font_02_sfnt_off00017351.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17351 10848 bytes
SHA-256: 80788205197e52b31dad48a3a061ee0cfea07454ec2f8b829e7538ee91c3ad8e

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