Malicious PDF — malware analysis report

Static analysis result for SHA-256 24e68fb9ebae34d8…

MALICIOUS

PDF

91.2 KB Created: 2021-06-25 20:00:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: af6fae7ce93418e671383bbb26e13a78 SHA-1: c3a781c56f82ed4995db45918abd7202f791c40c SHA-256: 24e68fb9ebae34d8c4a9c692dd5a92edbe03e99d87a9a8f8af042be6e557274b
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous external links, many pointing to compromised WordPress sites, suggesting a phishing or credential harvesting attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are consistent with delivering a second-stage payload or redirecting to a phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

Heuristics 8

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://wastran.ru/uplcv?utm_term=reminder+email+to+colleagues+sample
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/hkbad7untat2pkp5jf716883el/larelivojanomipop.pdf
    • https://protradingindia.net/userfiles/file/94645264278.pdf
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/0a34483a4b369c7809d9cfa31030bb47/buvak.pdf
    • http://jiangsutravel.kr/userfiles/files/20210617_060614.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/v0nfhr44aqtu01i4j1anlmbmeo/67131020239.pdf
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/27312b0311c6a02bc798865b2f3d66d4/98862015593.pdf
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/urs2ec5ve43v7j53a3riqui8o8/84577386230.pdf
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609accee416f6---nosojobetagiteritenaxemo.pdf
    • https://nepalipublisher.com/ckfinder/userfiles/files/xubatotokigorogilowoxaz.pdf
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/02m5k1g32lmbu0d6hvghc7mgii/riremasamod.pdf
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099fbdd12244---82088480385.pdf
    • http://abc-tel.ru/data/File/binawuvod.pdf
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/36fb6b07699b1340a4d7b9b0ff5fde3c/2123958488.pdf
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a47fd99d676---56128442214.pdf
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0fabdc73d---91621559659.pdf
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/93c9713e4e14721dcf30bb9d0e10b455/10907177024.pdf
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/d7ab1efb9e7d31af67afe83eefeb29ec/39593553042.pdf
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089a9bc0f01a---36812004209.pdf
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/ade2fa354d4fdecf53a30ac7e26459cf/pogabosevofumuvogumej.pdf
    • http://toddfamilyreunion.com/clients/4/48/482e924d5a052aa4a0c13eb8a30e0bc8/File/18113269674.pdf
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/59c025cadc0e4d1c28c32a44a87d456d/wibivujuxuxigokola.pdf
    • https://nusamulticentralestari.com/Uploads/userfiles/files/xuvigilexe.pdf
    • https://majubesar.org/contents//files/nadoxam.pdf
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b285cc0d88f---65729621371.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e837.bin
1330e9b912384749ab0f9b9312eb7b3834a16bd56f2818ee5374f4c06f67e451		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE837 11004 bytes
font_01_sfnt_off0001018a.bin
5cd8a120e106fc2d4fc1855603a636a3ce922decfb1b4d98f17a4a5450337c58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1018A 16344 bytes
font_02_sfnt_off0001177f.bin
a9e9a7b58308368df09df077c8e5d2b2110a7c086062d5169f48a18bbc29fe3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1177F 17464 bytes
font_03_sfnt_off0001452a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1452A 16792 bytes

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