Malicious PDF — malware analysis report

Static analysis result for SHA-256 f032925ded80caa4…

MALICIOUS

PDF

75.9 KB Created: 2021-09-04 03:32:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f0e01e10cf05e6bf78f4bcc8d41b12fc SHA-1: 5160094a2e4c4ac9106c291b8b8528c99b8e3188 SHA-256: f032925ded80caa4528fa946322d7a707fd55d00c984b36c26893c7487f3d20c
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to compromised CMS upload storage, suggesting an attempt to redirect users to malicious content. The presence of numerous unknown URLs hosted on potentially disposable domains reinforces this phishing or malicious redirection pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c0859f3b2ca---36004575910.pdf
    • http://www.southforconstruction.com/frontend/web/ckfinder/userfiles/files/satunakavosu.pdf
    • http://www.sname.org.tw/sname/ckfinder/userfiles/files/52895429988.pdf
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16094be3db0a7d---repakaxemupi.pdf
    • http://parkwaywest1974.com/clients/861606/File/livew.pdf
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/160895d3d98812---3694516867.pdf
    • https://mimpishio1bet.com/contents//files/60337855866.pdf
    • http://szentistvanpatika.hu/upload/file/65305805335.pdf
    • http://knshzj.com/CKEdit/upload/files/96046247456.pdf
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f41fbc9b64---robexizagubewajiwojufeje.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db72ce81b0a---83466837694.pdf
    • http://openendrep.com/userfiles/files/41992388324.pdf
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/625edbe7833ee5defbb81a3f601ff066/95354583324.pdf
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/cf12128aee01c07cc1fb63165f8549ec/28895672889.pdf
    • http://braghieriarchitettura.com/userfiles/files/13045567336.pdf
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cbcdf0f1a27---80182926824.pdf
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609a3080d5b91---zirununamadamokulaforamo.pdf
    • http://kyanite.tv/userfiles/file/balupunerokavegaxolu.pdf
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612577fb75a49---muzapiguzunusixaxipup.pdf
    • http://kiemtoanhaiphong.vn/upload/files/dikapopisavamorawiv.pdf
    • http://shreejians.com/userfiles/file/lazogaxazepobaku.pdf
    • https://binarbaidservices.com/public_html/userfiles/file/taguwugubonebusalavivopex.pdf
    • https://zoomkish.com/basefile/zoomkishcom/files/57032811003.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=bittersweet+book+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c45d.bin
8a6aa2e38ae8efad3f9ea89b84ad36d3e3637ac00a53ebe44918af8680b71077
pdf-font-stream PDF embedded font (sfnt) at offset 0xC45D 17580 bytes
font_01_sfnt_off0000f24e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF24E 16792 bytes
font_02_sfnt_off00010a65.bin
8217b1e441febbb4842e9a22b62108297dc44ea97971f4865deb638434ab7cc1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A65 10548 bytes