Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e15ce287830fbf7…

MALICIOUS

PDF

89.0 KB Created: 2021-07-20 03:54:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 7da0a77835d97787fbd2a48dd733a979 SHA-1: 30fcb04645f8681ba30d4cbcfa0f15d36c037b4b SHA-256: 2e15ce287830fbf7e949fbc7eba585b81a0138f42e3d584aef9d7efc0deca555
164 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised WordPress upload directories, suggesting it is part of a link farm designed to distribute malware. The presence of a 'download button' heuristic and ClamAV detection further supports a malicious classification. The document likely serves as a lure to trick users into downloading a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607908c96a9bf---4443340547.pdf In PDF document text
    • https://peptidturkiye.com/ckfinder/userfiles/files/34432401134.pdfIn PDF document text
    • https://slaterlighting.com/wp-content/plugins/super-forms/uploads/php/files/46d80343bf25c32efd5c6abca631a1b5/toligufomumezasive.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/7bdaa9c902aaa19d46a69c27e77b19de/69516964342.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/893bcb350add308484a6238add620366/jegasamuramaraduzemazone.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608a8bd945cd3---xowitogomovuxunolitigux.pdfIn PDF document text
    • http://nutronicltd.com/userfiles/file/4689718342.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9dbafc19f1---sapafapidoxodame.pdfIn PDF document text
    • http://malverne69.com/clients/a/a7/a743c233813d1a1dbf5c38c484d85cdc/File/43116950396.pdfIn PDF document text
    • http://immodraft.de/images/architekten_agentur_images_/file/jajisagivesetaxuwodil.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba4d7e7bff4---favugopirafutogazus.pdfIn PDF document text
    • http://alexdisinfestazioni.com/userfiles/files/fozozisomimosotavika.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f236face509---rusorigosanup.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/lozusuxuvowawem.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/a1182su9bnqs8d1ro87526o901/55922022419.pdfIn PDF document text
    • http://www.juniorcollege.cl/ckfinder/userfiles/files/64279567284.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/ff6c32b4c6d462625b4555d72b0850b1/6314376188.pdfIn PDF document text
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/o4gn9bnthc00jf7j1ek89t1176/3284991221.pdfIn PDF document text
    • https://nikoljski.com/ckfinder/userfiles/files/29792829076.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c85ff37280---mutoxenavefefabarononedet.pdfIn PDF document text
    • http://antansconstructions.com/ckfinder/userfiles/files/95413199893.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/30585673340.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/vrh1q4rlcq9ff2rsutk8pt54q9/70615871968.pdfIn PDF document text
    • http://cloverpark1960.com/clients/1/17/17c242f0968dc4bce059666b43fbd075/File/zesetogusu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=meet+the+spartans+movie+download+in+tamilPDF 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_off0000f980.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF980 16988 bytes
SHA-256: 67870c5f86c152146f382ba865906703816c50006209b21754dac678b3b4d68b
font_01_sfnt_off000125c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125C8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013ddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DDF 10804 bytes
SHA-256: fa0ef53b46a3e10fa83a9b896e7d68f50f5894bc2073d8686877e61de03a1298