Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f8d0b6f219dc1ca…

MALICIOUS

PDF

72.6 KB Created: 2021-09-04 11:00:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: c40605bb0ca5e7ebca78ee3879410545 SHA-1: 99a66095fa79f6a0cb994dd18329a0457e7c3c09 SHA-256: 0f8d0b6f219dc1ca8ec735df8de1ca30e448ce853afa3d81719311c611db9a07
96 Risk Score

Malware Insights

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

The PDF contains a large number of links pointing to various domains, many of which appear to be hosted on compromised WordPress sites or disposable hosting. The ML classifier strongly indicated maliciousness, and the link farm structure suggests an attempt to manipulate search engine results or redirect users to malicious content. No scripts were extracted, limiting the analysis of direct execution capabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://mtsskzy.com/userfiles/file/49407776405.pdf In PDF document text
    • http://stroisvias.ru/userfiles/file/biviliwaxowadoluf.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/844d0c836db81e684a87431c8a0a0c83/92892808156.pdfIn PDF document text
    • http://xn----dtbfdwc0aaaev8k.xn--p1ai/ckfinder/userfiles/files/85603275776.pdfIn PDF document text
    • http://s-privod.ru/userfiles/file/9256547240.pdfIn PDF document text
    • http://deurenhanger.nl/userfiles/file/68586926815.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/e24a740bbabf2045b4c12671967fc917/69439851077.pdfIn PDF document text
    • http://quick-thailand.com/images/uploads/file/rasufoz.pdfIn PDF document text
    • http://candientuvibra.com/images/file/75559235741.pdfIn PDF document text
    • http://www.tomasjelinek.com/img/pub/file/narigunudelifolanan.pdfIn PDF document text
    • https://stradatextiles.com/upload/ckfinder/files/38621439533.pdfIn PDF document text
    • http://sbox-technology.com/upload/datoteke/pokezasimixezifi.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/31865a199d53f5e5d4443d09b87b656e/38858614696.pdfIn PDF document text
    • https://mahae.hu/files/files/96820926915.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611860aaaf180---39364267283.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/ks08rtglaccurmbn9m6h3is1gb/sonugokanuga.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098ca78f0120---46262905639.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092c0db9048a---luniro.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/5dbdac79b45190a89ac5cac39b3bec44/kupuxapolegaruri.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b505a92eeb0---dudivaguno.pdfIn PDF document text
    • https://tsegypt.com/file/62601783895.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d344ec5b64---tagadake.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db4b1d72e7e---logugumuzufotamox.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=elcometer+456+basic+f1+manualPDF 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_off0000b49d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB49D 11152 bytes
SHA-256: 2756ad745903c9dd88cb87790258a8b30bad50ff00ecfccc0326e3690e1e9449
font_01_sfnt_off0000cece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCECE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e6e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E0 17936 bytes
SHA-256: ab2818c27a3c7b435fc558cb70e7ede575fab33df50e6aa06d21642ce03e60a5

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