Malicious PDF — malware analysis report

Static analysis result for SHA-256 095280908f0d3827…

MALICIOUS

PDF

79.8 KB Created: 2021-08-07 20:22:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: e8049845ff27ab92e2cda7afd30373e9 SHA-1: a158bccf69f5c9a1449c3aa516537e834f050bf1 SHA-256: 095280908f0d38279ac412614003039c94464e83a2e0ed73fb5e19efafb5e157
96 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of multiple compromised CMS upload links reinforces this assessment. No scripts were extracted, but the document's structure and embedded links suggest it's a lure for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094a7f8de4aa---87824057909.pdf In PDF document text
    • http://traiteur-ribot.fr/userfiles/file/91038494250.pdfIn PDF document text
    • https://norservis.com/files/files/31460618140.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608490a031329---sufulosotefito.pdfIn PDF document text
    • https://bostaninsaat.com/image/files/64644760512.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16078c6f8e08a9---lezejejujubabezudatesem.pdfIn PDF document text
    • https://aokman-drive.com/d/files/wegipezoganuvadulejones.pdfIn PDF document text
    • http://anhopphat.com/uploads/files/metofilewek.pdfIn PDF document text
    • http://nanoscopy.ru/uploads/files/17320322132.pdfIn PDF document text
    • http://hopkinshigh62.com/clients/7/77/7764523e397120ad9b09b1da26998858/File/fatamikax.pdfIn PDF document text
    • https://room12shio4.com/contents//files/77955563865.pdfIn PDF document text
    • http://hgbs.de/userfiles/file/rugegonazikikisanerevexa.pdfIn PDF document text
    • https://kumsalgame.com/calisma2/files/uploads/dotowibozo.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/45b9ece272f88b0a638b393bbfe8d57a/lubifalegewa.pdfIn PDF document text
    • https://foodphotoshop.com/userfiles/files/dobotamuzazep.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a292c9e59fe---47975437401.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/file/29924205288.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/1b17811a4116d7980ff457a2426c6eef/58063361073.pdfIn PDF document text
    • https://armagedonspedycja.pl/files/file/dasukemivupujuxasoxadagop.pdfIn PDF document text
    • http://abwingssuffolk2.com/uploads/files/zawamudi.pdfIn PDF document text
    • https://questyme.ca/userfiles/file/59147155428.pdfIn PDF document text
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/00bba8f186e73d614008b58d03ec2a6d/54811759918.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/8s2alj3063h01bncm6p8i4lags/40086612037.pdfIn PDF document text
    • https://hoakhanh.vn/uploads/image/files/jusutoxegid.pdfIn PDF document text
    • https://vieclamday.com/userfiles/file/74641918018.pdfIn PDF document text
    • http://cestovni-postylka.eu/userfiles/file/voxeriregozolorugig.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5146c00c44---41949720600.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=how+do+you+get+free+gems+on+clash+of+clans+no+hackPDF 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_off0000d0c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0C2 17416 bytes
SHA-256: b02ddcb5288bab87f41259a83e44f41359771c4210b98e1139101759d7086570
font_01_sfnt_off0000fea1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA1 11212 bytes
SHA-256: b76627c893ec85b15f43efb0212aa4adf13afbe15f6f6b5a2a2e7e8e0fc2ace9
font_02_sfnt_off00011895.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11895 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1