Malicious PDF — malware analysis report

Static analysis result for SHA-256 b93ff6631e56c2a0…

MALICIOUS

PDF

93.0 KB Created: 2021-08-09 05:53:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 6dd01e187ecb45d9edda186416b2e38b SHA-1: fa8501d65f7763ee0d51b97fd17da88bd2b4f830 SHA-256: b93ff6631e56c2a0c4385b357903018838041ff2f76ba390f06c72c3f5580523
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It functions as a link farm, with numerous URLs pointing to compromised WordPress sites and other domains, likely intended to lead users to malicious content or phishing pages. The presence of these links suggests an attempt to exploit users through deceptive redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://drivescuolaguida.it/userfiles/files/54753975058.pdf In PDF document text
    • http://chixue.com/uploadfile/file/20210721080537.pdfIn PDF document text
    • http://shqinze.net/admin/upimg/file///sigobavimikevoxusazukirun.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/ln1j22tjbqom4vnubklpjqse02/41642700501.pdfIn PDF document text
    • http://www.anapharmata.hu/ckfinder/core/connector/php/files/18206278037.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16079a8df2218b---ronebanonigujolazopaso.pdfIn PDF document text
    • https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/23700e282ea7ac7274f5aa78f00f6b76/18130174465.pdfIn PDF document text
    • http://zonwering-belgie.be/ckfinder/userfiles/files/21881370659.pdfIn PDF document text
    • http://reginahajo.hu/_user/file/38861103865.pdfIn PDF document text
    • http://adveotec.com/img/file/13305695377.pdfIn PDF document text
    • https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/ff4c4d83507954b1ddfd579ae7df8733/66365912077.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/95c4087b821c9f50f74d7e64684b3629/fetazigunawokeperilujemux.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160f453fa15756---pagovodoxakanubi.pdfIn PDF document text
    • http://robedecreateur.com/img/files/romezeruzobupasi.pdfIn PDF document text
    • https://datawire.gr/files/files/takonoxulejakokum.pdfIn PDF document text
    • https://brakos.it/file/molebojum.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/08135c043d1b32be6ff85b40cda1a9af/86348579425.pdfIn PDF document text
    • http://turskazka.ru/ckfinder/userfiles/files/58804558857.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c3902a00ea5---lovuwexapefiwamakafovukut.pdfIn PDF document text
    • http://szyldkj.com/luodan/images/userfiles/file/52071598103.pdfIn PDF document text
    • http://dr-onesrl.com/userfiles/files/jumovitalagejasosetogo.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/cb7c2e68c64d5183b459cc8f8aee712b/xesilo.pdfIn PDF document text
    • https://myvideoclasses.com/ci/userfiles/files/14548259077.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=how+did+the+alliance+system+in+europe+lead+to+world+war+1PDF 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_off00010764.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10764 11120 bytes
SHA-256: 174b78a36558989fe25ef6a3f99dc42a0134a20726677bcb412769cf38b29a68
font_01_sfnt_off0001212e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1212E 17088 bytes
SHA-256: e47a84ee50effc5d1f747af074898613cde19ce37537dbb0f805f9004e466ae2
font_02_sfnt_off00014d92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D92 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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