Malicious PDF — malware analysis report

Static analysis result for SHA-256 49179f0fa2c8d108…

MALICIOUS

PDF

77.3 KB Created: 2021-09-01 00:14:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 8deb4bac2fe8ccdfa5f263dd1d323b98 SHA-1: 736c90bec8790dc28f3d344b4910e92133a75445 SHA-256: 49179f0fa2c8d1088beee4ef95ad61a9d686bc11d76d936a04636d17d84fbaed
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and links to compromised WordPress upload storage, indicating a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a malicious document, potentially leveraging embedded JavaScript for redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://cructi.ru/uplcv?utm_term=private+story+insta PDF link annotation
    • https://hssanesteban.cl/files/dedinitepopisilomalizure.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16073ad6e20ffa---14246721697.pdfIn PDF document text
    • https://isosklo.cz./uploads/58460387944.pdfIn PDF document text
    • https://wulf-sanitaer.de/wp-content/plugins/super-forms/uploads/php/files/6bbu0n8ga9chu6nmuuobif19q8/bugodeni.pdfIn PDF document text
    • http://cybernet.asia/UserFiles/File/72972007363.pdfIn PDF document text
    • http://redactron.com/userfiles/file/wujogududufumufotikozat.pdfIn PDF document text
    • https://nevisnews.com/userfiles/samulokemivokuv.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/rergeo09rvb2m5hco611n8tg75/4541949519.pdfIn PDF document text
    • http://revize-elektro.info/UserFiles/File/zekimotov.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/0a51209a51439aead9528232137ab5c4/22285401739.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607b11d872032---92032764026.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16105c63247f5e---timasewewavaxilaniketepat.pdfIn PDF document text
    • http://dfwarbitrator.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/57095733673.pdfIn PDF document text
    • http://flexa.cz/docs/file/nusogoki.pdfIn PDF document text
    • http://mmt24.ru/files/file/sutoza.pdfIn PDF document text
    • https://pmms-online.com/assets/file/vogenilaxisugesuvusaza.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/302edd8c9a009cefe07fd03e6b169071/seworuxumadesadakej.pdfIn PDF document text
    • https://foundryindia.org/userfiles/file/nofodotixifekugotu.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/f46e192c730f6b77839aeb359491acf6/44537789046.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/ed70570e65e2d34cef15d8acfdf1e90f/15032894113.pdfIn PDF document text
    • http://lingeriedediva.com/UploadFile/file/2021081022275473499.pdfIn PDF document text
    • https://aimhc.com/userfiles/file/lebaniferomobufisuzo.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5c02602f24---jadinajaw.pdfIn PDF document text
    • https://www.rapn.ru/ckfinder/userfiles/files/dozixenidikawovarowimatid.pdfIn PDF document text
    • http://cgl.lu/userfiles/files/7414740924.pdfIn PDF document text
    • 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_off0000cc30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC30 17168 bytes
SHA-256: 28cebe8f9327dfb2c3786a133c2251261db3003d232c8eef442c481d5286c174
font_01_sfnt_off0000f841.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF841 10236 bytes
SHA-256: bde1feb3a42235ce08c0585a6348de5435d7f2e880821392d5204f8538138beb
font_02_sfnt_off00010f73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F73 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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