Malicious PDF — malware analysis report

Static analysis result for SHA-256 adb9df82428e71ec…

MALICIOUS

PDF

89.7 KB Created: 2021-07-29 19:17:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f3badba4242603b3d89b5b79385ec410 SHA-1: 8e15826bf42ecb2c769588d2e14c6ddb38f48aa3 SHA-256: adb9df82428e71ec1b312cd63973c339e181a21e1dafa56acbebebcb7e5c6285
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and ClamAV as malicious, specifically as a phishing or trojan delivery mechanism. It contains numerous links pointing to compromised websites and disposable hosting, suggesting an attempt to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16078148f27b0d---29588842530.pdf In PDF document text
    • http://jullien38.com/ressource/site-image/files/6276365713.pdfIn PDF document text
    • http://maristaslardero.es/userfiles/file/sevosaberaluruted.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160c16aaba571a---suzodijuzesizareb.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3b256e2e80---85539715100.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/660914871cc0669398cd4895dfcfa4ee/37307250016.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a773848ea02---labijosuzuvimam.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/zabibenudidavurakute.pdfIn PDF document text
    • https://daiichitravel.com/uploads/news_file/vunavozesonurisevewow.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/94a4e94d411aba5a0dd8d9ce93395faa/javamivopuxor.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca2eb86eade---68493922942.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/eeba53e9ececec22b1424132b6263724/kigenotatatafo.pdfIn PDF document text
    • https://bahispesinde.com/gnc/veri/_files/57064595978.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/93bac7655fee05ef35f2b21747b48601/20604935824.pdfIn PDF document text
    • http://dienvietbac.com/uploads/files/favewezezir.pdfIn PDF document text
    • http://avision-italia.com/userfiles/files/xizarovu.pdfIn PDF document text
    • http://extrastyle.ee/ckfinder/userfiles/files/vipibatupafadesefuve.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/230bfe6c590c05b3c45802457bfd4dc2/bapakapafaxezodided.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/ltr82u8elumnsd1tb5osqql3c1/70428021485.pdfIn PDF document text
    • http://szkolaprywatnaleszno.pl/userfiles/file/57628742428.pdfIn PDF document text
    • https://aradovan.com/userfiles/file/69476953951.pdfIn PDF document text
    • https://olivier-daulte.com/ckfinder/userfiles/files/20291978918.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/2efa8d2812174b8c35ebe95d1a2b1f30/47253818439.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/37397480348.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/2dd50c5dae2164c9fa629650a5df14bc/79810539587.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a364495fb7b---80803631680.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=sonia+tlev+top+body+seche+pdf+gratuitPDF 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_off0000f44e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF44E 11396 bytes
SHA-256: be03d52e05e6095b202d8705d76e2cbe8934f65ea065776c0564dae1ab726f74
font_01_sfnt_off00010ead.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EAD 19264 bytes
SHA-256: 296551b8db4fe801a8d84b63c709f5f182c635c0aff685abb4a76f67e27b2eaa
font_02_sfnt_off00013eb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EB9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1