Malicious PDF — malware analysis report

Static analysis result for SHA-256 04cceac6becacd34…

MALICIOUS

PDF

87.0 KB Created: 2021-07-24 21:31:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 0a7b1168eda46eb49ce351889892d163 SHA-1: f4717b9f30d85f7127f80619b43c992883053d8f SHA-256: 04cceac6becacd34634b9f0320fb37962ab3f301351f2fb9ee488b537f029e85
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to lure users to external, potentially harmful, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9059ed4b8---radabewaxe.pdf In PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8886dad72---76769693976.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160768a1dbcd59---58921356274.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/73373262666.pdfIn PDF document text
    • http://beiks.info/public/file/79742228168.pdfIn PDF document text
    • http://rajskiewakacje.pl/userfiles/file/44082693760.pdfIn PDF document text
    • http://santeh.md/img/files/notujovikebutigel.pdfIn PDF document text
    • https://tfsroanoke.com/home/tfs/public_html/new/ckfinder/userfiles/files/bazurenavijerurudase.pdfIn PDF document text
    • https://campermagazine.tv/public/file/gizufirogezegizo.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/56e57d30cbec3bbed64dcf4c730e7f28/71976447548.pdfIn PDF document text
    • http://vorne-sitzen.eu/pcms/content/file/63772801392.pdfIn PDF document text
    • http://trungnguyenjsc.vn/uploads/image/files/76508321993.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/ccac1b920adbcee6d1a0769b2f16684b/79110554142.pdfIn PDF document text
    • http://papianiarch.it/userfiles/files/23951304573.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607562ae300bc---deturigetaraxin.pdfIn PDF document text
    • http://townofwinslowin.com/flash/townofwinslowin.com/file/vanixenokijekuviso.pdfIn PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/46a5ecaec5e2d0275933e191b25466cc/winatarisob.pdfIn PDF document text
    • http://pn-tech.net/userData/board/file/24341204502.pdfIn PDF document text
    • http://bjhtdszdh.com/v15/Upload/file/2021718425383444.pdfIn PDF document text
    • https://andrejc.si/files/file/popetu.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/3fndkn1svdihrsnp9o4b0h6vvj/17356402229.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a4e0acd3229---51856930356.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be6e2c00383---popolaxemefudedali.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/furabiwidevevedixuropuf.pdfIn PDF document text
    • http://com123.vn/uploads/file/nurek.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=injustice+ios+hack+2020PDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e676.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE676 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fe8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE8D 10696 bytes
SHA-256: 39d6706a2fc47c419072ea07772dd5d31a8dcfb466bd5540b37c49f02b02e886
font_02_sfnt_off0001171c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1171C 17796 bytes
SHA-256: b64c4b19516907690eb18f185282db92e04026152c0105eeb679c1c5a2e56262
font_03_sfnt_off0001461a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1461A 1692 bytes
SHA-256: 6df00093d1a1fd8b8f95901b42ba2863538c90606311dd4adf1993a433792d13