Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce7e2a5f1d448af0…

MALICIOUS

PDF

85.1 KB Created: 2021-09-23 15:38:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f2528d7950da88eed44c2f9bb7ab69df SHA-1: a75a35ca2242898b8c12b84a8b12ec42601b1d70 SHA-256: ce7e2a5f1d448af0ca035b323ebd8c18aed27b5e9389b436f3dad2a4252fc78b
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The presence of these links indicates an attempt to lure victims to external malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://flomojapan.com/upload/files/lawedopubon.pdf In PDF document text
    • http://hanleyresources.com/images/nimifurujujuv.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614c16d20333e---16836285207.pdfIn PDF document text
    • http://www.protectakoteasia.com/ckfinder/userfiles/files/vivadaxevozukupenuxegow.pdfIn PDF document text
    • https://elnativocoffee.com/silver/upload/files/8883692578.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135fd5c3102e---16124978944.pdfIn PDF document text
    • http://ytlcases.com/userfiles/file/65191260150.pdfIn PDF document text
    • http://neoneophytou.com/ckfinder/userfiles/files/92751436865.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/54ec65fdaece44e00313d1cdf8111602/54132287375.pdfIn PDF document text
    • https://wsbe17hongkong.hk/_bin/ckfinder/userfiles/files/35730386500.pdfIn PDF document text
    • https://larioenergy.net/uploads/file/18329485192.pdfIn PDF document text
    • http://jindi2010.com/uploadfile/files/sovisaligemed.pdfIn PDF document text
    • http://siltherm.com/ckfinder/userfiles/files/52384224956.pdfIn PDF document text
    • https://commonwealthsportsawards.com/userfiles/file/jakanafubadenit.pdfIn PDF document text
    • http://pantipplaza.com/userfiles/file/fubizutufebuzomizodogesu.pdfIn PDF document text
    • https://autoroman-service.ro/imagini_ws/83497289203.pdfIn PDF document text
    • http://speckletrack.com/update/editor/file/63094556576.pdfIn PDF document text
    • http://zangerlelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/ranuwazozumef.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/161369ddef084a---fetoboje.pdfIn PDF document text
    • http://hzzxtl.com/UploadFile/file/20210919175715708.pdfIn PDF document text
    • https://thuhuonglacquer.com/uploads/news_file/lunetuwibijuwel.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/lat8c72btqnvt7vurut22d33nr/jorikep.pdfIn PDF document text
    • http://cassotech.nl/site/data/ws/files/bopamerexajam.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/0b783db14b7f30edea649de81334bf25/93768344862.pdfIn PDF document text
    • http://greenld.com/userfiles/39794336756.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=best+multiplayer+horror+game+for+androidPDF 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_off0000e991.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE991 16632 bytes
SHA-256: ffe4cc3f071e3d8e8936a36847295e9f9bca2337e321cddb6c3788e2933e4fd4
font_01_sfnt_off000114c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114C0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012cd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CD7 11212 bytes
SHA-256: 26397b56d1af4ecbb0400f780c54b4be6ddca2ac09a18ce99fcc3535f1859032