Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e10067d9302f3b1…

MALICIOUS

PDF

88.9 KB Created: 2021-09-02 13:13:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 5025a5a291ca6457385ff3918ae12018 SHA-1: 7a99df7b429a73ee2fa9796657263e830b394b86 SHA-256: 9e10067d9302f3b114087f2041bf54189b55da683011cad2cda0bc6f24cb0358
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains numerous links, many pointing to compromised CMS upload storage, indicating a link farm designed to redirect users to malicious content. The presence of multiple distinct hosts and the use of 'utm_term_redirector' suggest an attempt to obscure the final destination and potentially engage in SEO poisoning.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1876d99272---98162028926.pdf In PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4dbacc61048c2c3fae1e68e11d8c0827/samip.pdfIn PDF document text
    • https://fablab808.com/nbloom/fckuploads/file/xedisakovakunam.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611d3c62ac19f---gexegimufuwegilipemuz.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a142211bdc4---towiz.pdfIn PDF document text
    • https://ahha.az/userfiles/file/86577517963.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612d893c863fe---46678379411.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160885d58bfede---12135434676.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/8358709911.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609f286353cbd---wadilimibovipubisu.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/27c503243c05b13839396bf51a7b8676/gudesa.pdfIn PDF document text
    • http://highendschmiede.de/highendfiles/file/84645144838.pdfIn PDF document text
    • http://bugaboo-buffalo.eu/UserFiles/File/biborolosukadobuximan.pdfIn PDF document text
    • https://xo-sound.ru/userfiles/file/65160205670.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607bf2d18ace3---38389364445.pdfIn PDF document text
    • https://birudongker.com/contents//files/poxepekofejosinufesamore.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e0e22496d3---76368191245.pdfIn PDF document text
    • http://ongnuocdenhat.com/upload/files/fiwovizutobijaxijuvawule.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160844c589fb84---molaxejakujumopo.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8743d6d86---88518694561.pdfIn PDF document text
    • https://avigailpekelman.com/sites/default/files/file/52103449196.pdfIn PDF document text
    • http://niengrangchuyensau.com/upload/contentFile/file/xamalenepevezevilewo.pdfIn PDF document text
    • https://medicula.pl/web/uploads/files/89800325674.pdfIn PDF document text
    • http://zavalinka.by/var/upload/file/xisibexupudut.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=kabaddi+information+in+english+pdfPDF 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_off0000f65c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF65C 11076 bytes
SHA-256: 55fca364242af662ecfe288989e590b9a6f234beb867b8d0841c0167a4c20fca
font_01_sfnt_off00010f87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F87 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012799.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12799 17976 bytes
SHA-256: 1ace769e37dc4420fd45022c8a6fe23a485b40b05ac3bb9d085b58567453c66b

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