Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fe4bfb8b0d6c788…

MALICIOUS

PDF

85.7 KB Created: 2021-09-04 17:19:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 7411798d3cb8ce5a5e21048d076c6219 SHA-1: 880b91576d24fb3bf50fee6152907653dc5d1ab3 SHA-256: 0fe4bfb8b0d6c7887e86263e5eee5229a5f76b669b0610b1466e831bf04f3d88
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories, suggesting a link farm designed to redirect users to malicious content. ClamAV and ML classifiers strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607836684c328---naxepozuge.pdf In PDF document text
    • http://ski-experience-japan.com/images/blog//file/34844989002.pdfIn PDF document text
    • https://tigapilar.com/upload/files/76436364638.pdfIn PDF document text
    • http://architettodrabeni.it/userfiles/files/zawudinosupasirotuw.pdfIn PDF document text
    • https://nibrasimansch.com/userfiles/files/tikelejudovejojoxujiruj.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/rg2vapvbpj81iouqg8dvg2q7b5/50299453323.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/161086cc2b3cd7---68700061192.pdfIn PDF document text
    • http://schroniskoorzechowce.pl/ckfinder/userfiles/files/jesukukuxujukenupejo.pdfIn PDF document text
    • http://perfekttorun.pl/pliki/vuzukebiritekokozejibuni.pdfIn PDF document text
    • http://manleyboone.com/clients/3/3d/3dd19be848c73b0ce3a0430f7fd535f3/File/gibakesivinewatodejemosa.pdfIn PDF document text
    • https://pmms-online.com/assets/file/61416436379.pdfIn PDF document text
    • https://wagaskar.com/media/xafijijo.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ff7d945bf6e---13818252216.pdfIn PDF document text
    • http://rsti.biz/files/fck/file/wurajarupujexi.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/96ef5f3048dc87aa3f0387039ddb9951/30488121770.pdfIn PDF document text
    • http://jan-fotografie.nl/upload/files/pamedazegisarosabasab.pdfIn PDF document text
    • https://hazeloyun.com/calisma2/files/uploads/gerotodanigumitijarubajuv.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/kusuvakefomewazadunipi.pdfIn PDF document text
    • http://hillsdalehorseboarding.com/ckfinder/userfiles/files/70820161714.pdfIn PDF document text
    • http://119hero.kr/userData/board/file/kufutipibupepazuw.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/7ee5e68330a8edf3303e65028d9783ee/vukimovujupor.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087d7aa1cc61---75273367694.pdfIn PDF document text
    • http://apartmaji-zunicmile.com/uporabnik/file/diwugujosesegovo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=anatomie+des+os+du+pied+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_off0000e60e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE60E 19828 bytes
SHA-256: c4d08766ffa9cee8aadb33741430d44b3d5ab9b60f92bba3ba639ce9d8bfb95c
font_01_sfnt_off00011856.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11856 10592 bytes
SHA-256: e473d9b04febff92963af297074d896b85728334b7cad1a7402aa1b7afd2ef93
font_02_sfnt_off00013090.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13090 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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