Malicious PDF — malware analysis report

Static analysis result for SHA-256 27a8226b2f3f71a7…

MALICIOUS

PDF

82.1 KB Created: 2021-09-06 06:34:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: f4f3dfade00aaf113b4ca7ed3dbaea5a SHA-1: ac5eaf71ea2613a34c732e90440f6f3e5aeaf7ce SHA-256: 27a8226b2f3f71a7a917efbd7490257f51521399b00cd5db1ceebb2793b5c390
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbf7e6784c---xipuruzez.pdf In PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607788d01f571---26635272614.pdfIn PDF document text
    • https://triptoboloyfoundation.org/editorsfiles/files/59612555587.pdfIn PDF document text
    • http://liceoadultos.juniorcollege.cl/userfiles/files/82120504780.pdfIn PDF document text
    • https://damsindia.org/admin/uploads/file/81979611007.pdfIn PDF document text
    • http://pampa.be/uploads/userfiles/files/29362490122.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/16114f1d14f210---76736757251.pdfIn PDF document text
    • http://elisa5888.com/shopadmin/upload/files/jofegogimefunaked.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/aac2fb83b8c16639dacc03f2a757c02a/66729095510.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/38e9917e4a9c9595f3080adf5e3f7179/52649835136.pdfIn PDF document text
    • http://namngonviet.vn/user-/files/74554039141.pdfIn PDF document text
    • http://tbm-mova.by/images_from_html_editor/file/73448827089.pdfIn PDF document text
    • https://karapinarinsaat.net/userfiles/upload/file/72166089774.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/v3qucg5ctr9pteeh4rvtoeaa12/poxaguruvexubur.pdfIn PDF document text
    • http://trans-serwis.com/userfiles/file/61032005538.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee4052fb38---lunukajakimemezawarabuja.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/xuzuxiwuporov.pdfIn PDF document text
    • http://emeraldcovepartners.com/_data/images/file/48094118522.pdfIn PDF document text
    • https://saam.vn/images/content/file/68854818953.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/1335fd38ce78670aa814b8bb56cf12a9/47467791715.pdfIn PDF document text
    • http://ipceurope.com/assets/file/sazaninutipomef.pdfIn PDF document text
    • https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/0094f9e69eaeb83b5c7e9b1b005546d6/vixokinajipalonomatime.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=market+leader+upper+intermediate+2nd+edition+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_off0000dbcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBCD 17696 bytes
SHA-256: a6e0297f0a1fdfcfd206e4d89605dea5f9f0dfede99f096bfe90e098a5070cd9
font_01_sfnt_off0001095b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1095B 10796 bytes
SHA-256: 21faa246b480951567f36ce2ef36b24c4c24e2d248055be5084516b4c4ee73c9
font_02_sfnt_off0001223a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1223A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.