Malicious PDF — malware analysis report

Static analysis result for SHA-256 a63bbd02cd00aa1e…

MALICIOUS

PDF

105.3 KB Created: 2021-09-04 20:31:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 6fcc1ed1922e3b121c88f8062d72ec35 SHA-1: 98a22851b402bcbb9b112b42e39bfe931d439882 SHA-256: a63bbd02cd00aa1e6ba4f7dddb4c30125550e4d6e1edd4ce94b5b6971c61ed1c
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier indicating maliciousness. It contains numerous links to external websites, many of which are hosted on disposable domains or compromised CMS uploads, suggesting a phishing or malware distribution scheme. The presence of these links and the overall detection profile strongly indicate an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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 https://laborke.ru/uplcv?utm_term=filosofia+do+direito+pdf+reale PDF link annotation
    • http://praguynakorn.com/praguynakorn/picture/datapro/files/dedezokolufesisiluzeri.pdfIn PDF document text
    • http://tostonet.cl/ckfinder/userfiles/files/notiritilatevanuvi.pdfIn PDF document text
    • https://teamcode.net/upload/files/5718826760.pdfIn PDF document text
    • http://xn--h49al33a2zdp0eo1x.com/DATA/file/20210606120053.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f0c5b99425d---83803635035.pdfIn PDF document text
    • http://frezerovka.by/images/fxeditor/file/nizixage.pdfIn PDF document text
    • https://gospel-streams.com/asset/ckfinder/userfiles/files/xubufomomatidute.pdfIn PDF document text
    • https://joebalogh.ro/imagini_ws/bowejilivutawigisoleniwux.pdfIn PDF document text
    • https://peintures-descours.fr/fichier/files/24420057257.pdfIn PDF document text
    • http://sevimticaret.net/userfiles/file/43881705747.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f22729162d6---755632453.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/aogojqm8j9ksognuj8tfc7le37/9629048207.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160ecd37957cdf---nelinawuvijupotuvikuzal.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160829c67d3d9a---86384365656.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160bb587eab83b---29838092800.pdfIn PDF document text
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/0j68tgvg69srbmtqg8qrnh1jq4/75739807271.pdfIn PDF document text
    • http://qataminational.com/uploaded_files/userfiles/files/lavetaxiji.pdfIn PDF document text
    • https://quangcaonoithatgiahung.com/admin/webroot/upload/image/files/31060819567.pdfIn PDF document text
    • http://zhizhencn.com/filespath/files/20210808083339.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5eccf7c1ec---livebefotuvojasinajewagon.pdfIn PDF document text
    • https://bdcomunicazione.it/file/jokafuwojulukes.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160742e8970eb7---giwefojejefomafewiradosed.pdfIn PDF document text
    • https://aksusu.com/upload/files/94764404909.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_off00013240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13240 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00014a52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A52 21544 bytes
SHA-256: 4f99024f6fc7ec10c9cd21ca46127e70637d86c3890fd2139480c470ed63c30e
font_02_sfnt_off0001800f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1800F 10364 bytes
SHA-256: 77c1cea276eed0e1443f0d9337ac14181d9ef32686c5baba7743d3a960dc14c1

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