Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff3c6701624123ea…

MALICIOUS

PDF

84.5 KB Created: 2021-07-05 09:14:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 7afb6fb648f3218f20f38edda6e98883 SHA-1: f28ccfee2ea604914d1ff81c6c7278718cb7c2f7 SHA-256: ff3c6701624123eaca2fcee0f0793b35aabedb6e42be86116f8107c594a6c68b
156 Risk Score

Malware Insights

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

The PDF contains a large number of external URIs, many hosted on compromised or disposable domains, indicating a link farm designed to redirect users to malicious sites. The ClamAV detection and ML classifier strongly suggest this PDF is malicious, likely serving as a phishing lure or a distribution point for further malware. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware delivery campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=daphne+and+velma+fanfiction PDF link annotation
    • http://absolutelyneon.com/userfiles/file/pirajumosefaxagirajoku.pdfIn PDF document text
    • https://hpsoft.shop/upload/files/tumig.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/fc098d8d2eaed18f4b8c7bc2ad4715e4/23802159498.pdfIn PDF document text
    • http://koreaseals.com/ckfinder/userfiles/files/zagidovuvefikemizijipa.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcaad2d7e55---15487256249.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/f5735b782c3fb6e447be5852a94cdaca/fovudidumufivubodopuf.pdfIn PDF document text
    • http://landpas.pl/upload/file/lufoxuden.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/7b7c7fa80d4f059b3c82faab49c71f9b/51787493589.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/20020630163.pdfIn PDF document text
    • http://benedictinoselrosal.org/ckfinder/userfiles/files/89300214531.pdfIn PDF document text
    • http://irinaburmistrova.ru/files/davapanototanabezogo.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/2fcc3f6f75554f6ec1fc445e9a60224b/72829157887.pdfIn PDF document text
    • http://chinalabware.es/d/files/livolupajinadupesota.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/jhj6pka70kgeq0imamicsf7bmi/revavosevatiripi.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/160878d4244ef6---gesexinujodekozepid.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0f7bca5a18---91916942902.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2d8e67a4f---20802263549.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/99e21575662d7ec7a3d8b504f6e04981/49505336358.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acf2a133d68---72724780824.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c4111e8e7c4---37215356812.pdfIn PDF document text
    • https://irish-setter-zucht.info/ckfinder/userfiles/files/fisakoza.pdfIn PDF document text
    • https://maggies-handmade.com/UserFiles/files/58039851778.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/220ab82fd5fdf76a014bd46c3407e917/wadevubupudavukimaz.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eaa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000102b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B6 16316 bytes
SHA-256: 26542236929ab1a5025ce018994082263b3541263de86b2a7a34b70c56344b3a
font_02_sfnt_off00012cf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CF6 10684 bytes
SHA-256: 6189421b66278db80d326335122d0ad02a1219aceb88461250c15bca91b68725

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