Malicious PDF — malware analysis report

Static analysis result for SHA-256 1894619ecaff8de7…

MALICIOUS

PDF

95.3 KB Created: 2021-09-01 12:22:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 76c89931e2342ec76f4f59229eb23f61 SHA-1: 0208fd3576020b6034bd20673b4e8b22a23aa1d5 SHA-256: 1894619ecaff8de784b8a2245f3bfcbda3950532a9a64254654f0c72de60d405
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by 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 0.9989

Heuristics 5

  • 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://tjclassof1971.com/clients/1/16/169b02496b2253913efe31a5b05f4f66/File/70754567632.pdf In PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a7309e21a20---69376679840.pdfIn PDF document text
    • http://talleresjpg.es/img/file/15201516953.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/7d5d34a2303f04138f1d6a63fc03becd/xexevamizomef.pdfIn PDF document text
    • http://dgjst.com/upfile/file/57430062762.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/16129a8614685b---lupejejimivofosamezalojat.pdfIn PDF document text
    • http://www.yoko-ono.be/images/userfiles/file/mijadopez.pdfIn PDF document text
    • https://biorenta.lt/ckfinder/userfiles/files/89715055899.pdfIn PDF document text
    • http://cdmatik.com/uploads/file/33638682593.pdfIn PDF document text
    • http://harrisonsfamilyreunion.com/clients/62911/File/bokobimoredak.pdfIn PDF document text
    • http://xn--b1agjlwjc3g.xn--p1ai/ckfinder/userfiles/files/10518367692.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/99403555408.pdfIn PDF document text
    • https://valstybestarnyba.com/upckfinder/files/wibuxasobirituwewumun.pdfIn PDF document text
    • http://www.leposeur.fr/site/upload/ckfinder/files/30982737203.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/ebji2srphtb33g56qrt0j5o0i4/zowuk.pdfIn PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/48d699f2c6dfc266489244f3aaee0d06/2411776642.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/mtgorl312680m5ii1vnhsvdd46/27513724177.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fc2e446eefb---moxarerinelekarupulir.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160db2c4aa7599---bisatobufusugalujef.pdfIn PDF document text
    • http://www.greenbriarpropmgmt.com/wp-content/plugins/super-forms/uploads/php/files/302dac2dd0440d0cc26ef25f47584729/68530974818.pdfIn PDF document text
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078706ce1f04---46923928657.pdfIn PDF document text
    • https://rowanmkt.com/Uploads/ckfinder/userfiles/files/fixufupebaj.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/3325scjlq4omab85gvv5ghj1s7/rosesuz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=bloons+pop+unblockedPDF 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_off00010aec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AEC 10440 bytes
SHA-256: 2b20bd37e110a028815a4f3abe8eca47b0c1419dc2926b79da5dcc910583b06e
font_01_sfnt_off00012279.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12279 20296 bytes
SHA-256: 044cb646d55bf926c9150a245ea5ce99168f3efc17b4d0638c816bf8f972bc48
font_02_sfnt_off00015793.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15793 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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