Malicious PDF — malware analysis report

Static analysis result for SHA-256 22e5a20831eca7b2…

MALICIOUS

PDF

76.1 KB Created: 2021-09-16 14:01:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7fc4c0aeab7a4ff744024494fb2d1746 SHA-1: eed227869d6bfedc42f42f10b10a53a31a1ad129 SHA-256: 22e5a20831eca7b2047468aa50adb53f60f7a90eb2565ee438a14204825fc2fa
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

This PDF document impersonates a cloud document lure, aiming to trick the user into clicking on embedded malicious links. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded URLs point to compromised WordPress uploads and disposable hosting, suggesting a coordinated effort to host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • 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://philabc.ru/uplcv?utm_term=descargar+powerpoint+para+android PDF link annotation
    • http://sosonomo.com/ckfinder/userfiles/files/45823177593.pdfIn PDF document text
    • http://finemetal-cn.com/upload/files/fezeruxekawixopediwozeg.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16131f31feb353---fegilutog.pdfIn PDF document text
    • https://biocenfis.es/uploads/assets/file/18318850924.pdfIn PDF document text
    • http://xn--2-140-swe8h.xn--p1ai/files/sivigojiweg.pdfIn PDF document text
    • http://clinicaveterinariagoitese.it/userfiles/files/52559419861.pdfIn PDF document text
    • http://sinosteelcode.com/filespath/files/20210913064912.pdfIn PDF document text
    • https://dehaventransportation.com/home/de/public_html/ckfinder/userfiles/files/pemazewenebizida.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613aba38eaf03---74487008983.pdfIn PDF document text
    • http://autosklo.sk/pictures/file/dujidebodisagupadadum.pdfIn PDF document text
    • http://55pluscommunityspecialist.com/userfiles/files/tajuf.pdfIn PDF document text
    • https://dallaslandscapedesign.com/media/files/rukulemak.pdfIn PDF document text
    • http://tomboy2.com/images/library/File/74336226137.pdfIn PDF document text
    • https://adci.vn/data/upload/file/88964610428.pdfIn PDF document text
    • https://orangcar.com/app/webroot/upload/files/tevidupikizuju.pdfIn PDF document text
    • http://vincitydata.com/uploads/ckfinder/files/63022975737.pdfIn PDF document text
    • http://lindseyderence.com/userfiles/files/wunufijopuzakabuv.pdfIn PDF document text
    • http://thietbianninh188.com/uploads/files/22499567242.pdfIn PDF document text
    • http://daotaoyduoc.org/wp-content/plugins/super-forms/uploads/php/files/6462b014e968e0a6f9d084cad53cf45a/jukikisopu.pdfIn PDF document text
    • http://dyglas.com/userData/board/file/nisuxifil.pdfIn PDF document text
    • http://bienchidan.org/uploads/files/ludexejedowew.pdfIn PDF document text
    • 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_off0000c45f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC45F 17712 bytes
SHA-256: eeec6ef7a63908719151e08c455788abbd90eb9e86adb050aadd0004ba92d6ea
font_01_sfnt_off0000f292.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF292 10732 bytes
SHA-256: ea1e2ff18e7b118b1126b53003058f254da01a87ee8390cb8a43d9eb8be2a316
font_02_sfnt_off00010b44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B44 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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