Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1202dcf3eb74f3a…

MALICIOUS

PDF

88.7 KB Created: 2021-09-14 01:38:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: a655c70f66cb63e677e41edc92d6b021 SHA-1: cb50bf2fd6c4806ab0270dae2806e23b7afed3c1 SHA-256: b1202dcf3eb74f3a450d73a6e3c3a9e489ce6c0adf315153e77463bbb0294595
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated a high probability of maliciousness. It contains numerous embedded URLs, many pointing to disposable domains, forming a link farm designed to redirect users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically identifies this pattern, suggesting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/4a8fdpt6h1vgfslndr8kfons66/26562471124.pdf In PDF document text
    • https://acrgruppe.de/userfiles/file/zunibixiwovakiripoxudi.pdfIn PDF document text
    • http://awarelaxcentrum.cz/user_files/file/21599836341.pdfIn PDF document text
    • http://cassotech.nl/site/data/ws/files/50532537819.pdfIn PDF document text
    • http://dooroc.com/tk/upload/file/33627646754.pdfIn PDF document text
    • http://walosports.cl/userfiles/file/wakiwig.pdfIn PDF document text
    • http://aerotechgroup.ru/img/outer/files/60769928856.pdfIn PDF document text
    • http://francescofesta.it/userfiles/files/xabowe.pdfIn PDF document text
    • http://collectifff.be/imgdb/accueil/files/63090325145.pdfIn PDF document text
    • http://fatamorgana.fr/uploads/assets/file/38914619053.pdfIn PDF document text
    • https://detskeihriska.eu/ckfinder/userfiles/files/zimavovig.pdfIn PDF document text
    • http://picassogift.com/Uploadfiles/files/12294828785.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613642b1cee20---xamejepumigudelupaxe.pdfIn PDF document text
    • http://jlsxjy.com/right/UploadFile/file///2021090703402673499.pdfIn PDF document text
    • https://satbietthu.com/luutru/files/borefexorabepen.pdfIn PDF document text
    • http://amirafouad.com/uploaded_files/file/kofomosoxobip.pdfIn PDF document text
    • https://mk-sito.it/uploads/file/55515246587.pdfIn PDF document text
    • http://yeosingol.com/FileData/ckfinder/files/20210901_CD461F90F86626E5.pdfIn PDF document text
    • http://top-rubber.com/admin/fckeditor/editor/filemanager/connectors/upload/file/zunodisuzipumapakugesu.pdfIn PDF document text
    • http://jolanyee.com/upload/files/202109062026055155.pdfIn PDF document text
    • https://www.abandassociates.com/ckfinder/userfiles/files/47733109842.pdfIn PDF document text
    • http://noclegsosnowiec.pl/eurostyl/photos/file/10618167174.pdfIn PDF document text
    • http://odontotecnicacoop.it/userfiles/file/93614762865.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=world+largest+area+country+listPDF 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_off0000f4c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C3 18356 bytes
SHA-256: 73a1f5693da475757315d92498ae4b24e6a8a8e0b3d6de6bf8df12334e9047c6
font_01_sfnt_off00012433.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12433 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013c4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C4A 10752 bytes
SHA-256: 5c1a54d63972b0eda9e93cc6079509977df08f0218220121836919a4884b383e

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