Malicious PDF — malware analysis report

Static analysis result for SHA-256 07d68f27c5c4389f…

MALICIOUS

PDF

78.7 KB Created: 2021-09-06 13:14:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 742b9d5ae8140b64a1966fb98f11462e SHA-1: 657e4ca557fb05c0d690506bc02d1243c6abcbaa SHA-256: 07d68f27c5c4389f8f653066c4aa543a88cea89770cf481587c9eff0c4038bcd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a link farm pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting. The presence of multiple external URIs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content. The ClamAV detection as Pdf.Phishing.Trojan further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://infrive.ru/uplcv?utm_term=naqabat+pdf+download PDF link annotation
    • http://zulassungsservice4you.de/bilder/file/jukib.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/61514827464.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f87cf41ab5---vawanokekesowesajovi.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086cca280282---5937825531.pdfIn PDF document text
    • http://mahnomenalumni.com/clients/879209/File/59193887387.pdfIn PDF document text
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/0ad72d27060da794f8eb336bbc2dff75/15075872748.pdfIn PDF document text
    • https://snowcat.pl/admin/ckfinder/userfiles/files/jutizijemixivob.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cde7e25db4---dofamubatagosetugamaben.pdfIn PDF document text
    • http://fecoil.com/userfiles/file/57845893989.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098b5962c8fd---salupamaxiwulexenoxaxumu.pdfIn PDF document text
    • http://schs1968.com/clients/861610/File/xozarafubafewalevozu.pdfIn PDF document text
    • https://pinpointfeedtech.com/ckfinder/userfiles/files/69633071804.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e3862de19e---xerebini.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/riit9qh7u6rmsrg234615f1go6/35739706425.pdfIn PDF document text
    • http://scuderieverdina.it/scuderia/userfiles/file/salomozaxetabibefegekabu.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/161219df2e618e---41676376330.pdfIn PDF document text
    • http://cukierniabrzezinski.pl/www/artizam/fck/file/goweduzepijera.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609d1c7851b7b---58332039711.pdfIn PDF document text
    • http://jfhcoaching.nl/userfiles/files/36754516917.pdfIn PDF document text
    • https://amenajarisiconstructii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160771fb216996---zasorezux.pdfIn PDF document text
    • https://marblobaths.ph/app/webroot/img/files/79129465840.pdfIn PDF document text
    • https://liniagdanskzydowo.pl/files/wuxurubiroxikerezikerug.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_off0000d109.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD109 10348 bytes
SHA-256: f8e5ec53d2c78d01e45200c5444985f0a7c1fd35a50338184aa3ee5046e817b7
font_01_sfnt_off0000e81e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE81E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010030.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10030 17392 bytes
SHA-256: 3714a6ec0c6110c93e483110945f304557e198db8000fe94e1e26dc8bf8a0b59

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