Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdc2dbd9061f39e4…

MALICIOUS

PDF

88.4 KB Created: 2021-06-27 00:43:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: af4869f449aac8108febf588f58dd7b0 SHA-1: f2080e84c4a3a7ace6f88febe0f74e84fb84cf22 SHA-256: fdc2dbd9061f39e46993a6e3bda532829124bece6098f69565fa46f91932044b
96 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to compromised WordPress sites hosting PDF files. This suggests a link farm attack pattern designed to redirect users to malicious content. The ML classifier strongly indicated maliciousness, and the presence of multiple compromised upload URLs supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/1608191b3a7585---97487502963.pdf In PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a918b040971---vufik.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608234e52227f---81130454250.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7801e3bc7---wajuvavusapiguban.pdfIn PDF document text
    • http://kardelendalgicpompa.com/uploadfiles/file/webojexaduden.pdfIn PDF document text
    • http://burattinojatek.hu/userfiles/file/30224132192.pdfIn PDF document text
    • http://coyada.com/up_images/up_images/83737427609.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b7c755b65---pitalabevilotamevupur.pdfIn PDF document text
    • http://charivne.info/images/file/56302144495.pdfIn PDF document text
    • http://aaaexpressac.com/userfiles/file/damumone.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/6lbjjj5s76e1ckmlip45ciqfo2/vakerelut.pdfIn PDF document text
    • https://mcq-exambd.com/app/webroot/ckfinder/userfiles/files/juraniluxa.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a029df33eea---livorasozigurus.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16081645699722---jabumebuwe.pdfIn PDF document text
    • http://tipsclubcr.com/campannas/file/58445126625.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160853229b8146---64423678093.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b289415af3a---28982568132.pdfIn PDF document text
    • http://eyupsifalibitkiler.com/resimler/files/28560900476.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/rpm2ar4gophl4uu4b0pkil4t30/80631198159.pdfIn PDF document text
    • https://noihoithanhtuan.com/media/ftp/file/gaxebar.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4175eb3ea8---pigafavalelelona.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608d0028c4ba0---36183670351.pdfIn PDF document text
    • http://pc75.net/upfiles/file/1620963460.pdfIn PDF document text
    • http://www.mediagrand.hu//data/editorfile/62960572836.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/160877f1658735---xiroli.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=heaven%27s+official+blessing+english+translation+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_off0000f4c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C5 17684 bytes
SHA-256: 4076f520880d2a150fc82ae756e991114bce9be1764fbaaf3a3244da5fbb4141
font_01_sfnt_off0001221d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1221D 11128 bytes
SHA-256: fe1db8ee61874dbec19e0cac8caffdbafc2fc40ba074b0b3a934db9b862e4475
font_02_sfnt_off00013baa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BAA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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