Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad062acfa34297d7…

MALICIOUS

PDF

90.0 KB Created: 2021-09-01 06:10:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: fc4e97f8a3e3a62294fa1ee5c269ea14 SHA-1: c91ce15581fdc6586aa29fda38faf3437365f762 SHA-256: ad062acfa34297d7c4abd2114215a46661b99332830837d46e69dc490799ca2c
96 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress installations acting as hosting for further malicious documents. The ML classifier strongly indicated maliciousness, and the heuristic firings confirm the presence of a link farm on disposable hosting, suggesting an attempt to lure users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 https://krisoc.ru/uplcv?utm_term=real+interest+parity PDF link annotation
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f308eaa8668---fusukudus.pdfIn PDF document text
    • https://www.hasmow.com.au/application/third_party/ckfinder/userfiles/files/28581021870.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/6d3601aedfccd68b445d6ea586c3cdb9/tavanodopexofinijasepuro.pdfIn PDF document text
    • https://yildizwebpaket.com/calisma2/files/uploads/najoboguzesavitoj.pdfIn PDF document text
    • https://senhewood.com/d/files/60703370517.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2919f1de6d---81529028399.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160983992d6597---mamama.pdfIn PDF document text
    • http://www.cenlajobinator.com/siteuploads/editorimg/file/zoxipa.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097088f7400f---22270358081.pdfIn PDF document text
    • https://drinkpoint.com/uploads/files/92955279649.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/5aab8a5df6cc3cc99239843867416b5d/91422173943.pdfIn PDF document text
    • http://arlingtonhigh1961.com/clients/e/ef/ef36f0800c0a5d5a0b00d5ecc8c3c6da/File/14339178394.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/16091e13617581---kotupelowasi.pdfIn PDF document text
    • http://beastyenergy.com/userfiles/file/93065618114.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c95fdc97108---49318089578.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/97218aace3cd9bb2ff7f630aac3ce6f7/24586829855.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/sifedutibukavodorolawoni.pdfIn PDF document text
    • http://brandweeramsterdamamstellanden.nl/userfiles/file/14230038737.pdfIn PDF document text
    • http://co-wemart.com/careeruserfiles/file/8473599830.pdfIn PDF document text
    • http://misosmile.com/upload/editor/files/13013423864.pdfIn PDF document text
    • https://ctsgroups.asia/images/file/18087785819.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/26421119349.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/88437e4917ce8a3f28b3a3a6786a8b21/92826223984.pdfIn PDF document text
    • http://4bx.pl/public/file/51139237189.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_off0000fd4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD4D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011564.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11564 10284 bytes
SHA-256: 3986f4af0eaaec4738c558b05e4a0e227a17e47ad7aac4cd635092376d3853f5
font_02_sfnt_off00012ca0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CA0 17588 bytes
SHA-256: 61d528e71fe328b9b5d312f38214ad36846f835e775195c4ca0f392d337beab5

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