Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebdeda264a919d0d…

MALICIOUS

PDF

86.7 KB Created: 2021-07-08 16:33:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: be7115aaedf145a55f4c4b367a9157b0 SHA-1: e51959c3cc630e8f2375c8e54ee420570849bfd7 SHA-256: ebdeda264a919d0dc4083a7a553c8b65a5464d0cef4e2a794292d26f2f2c2ff3
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document that contains a link farm pointing to multiple compromised websites and disposable domains, likely intended to trick users into downloading a malicious payload. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to facilitate the download of a secondary malicious file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://salon-urody-bellis.pl/images/file/15092510180.pdf In PDF document text
    • http://np-laser.com/upload_fck/file/2021-6-21/20210621040613275818.pdfIn PDF document text
    • https://gym-rectif.fr/ckfinder/userfiles/files/ruwobupu.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e04f7d663c---33226228789.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/b23899f941a6d4d05225456b63bde3b2/96313246679.pdfIn PDF document text
    • http://ztkammer.at/uploads/file/sipukadenukinevelos.pdfIn PDF document text
    • https://cowichanseniors.ca/userfiles/file/22452410232.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/df145d9085d2d97326846cc0ce782fca/mezilesesogaxomik.pdfIn PDF document text
    • https://studiorampinelli.com/file/81084217842.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c9950819824---64986508035.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/ca35cc60f9464b0bc65277b9475c3dc1/zisirad.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160b082b472d4d---43865310820.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/14046dacda0cec5f478894af0c92d810/zebebuxirisofa.pdfIn PDF document text
    • http://chaitraglaze.com/uploads/nomusiguvuzowileloravotod.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/831d8f81bcee2040566e8e10836a2f6c/wozisezidavidekex.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9adf92e382---98833168201.pdfPDF link annotation
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160919f69a9d52---85549025737.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ca92de3a92---3710193318.pdfIn PDF document text
    • https://murtenhof.ch/userfiles/files/82269595971.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/tnp01db7nrksgi17ihd5j2nt53/29597207053.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/8bjb1id723s8khl2lrgg4ucv54/47775658231.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607de6742500a---1674802310.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160adb0487b83b---23421381360.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c1949ccf0a8---miziruvelimebez.pdfIn PDF document text
    • http://roanfamily.net/clients/0/01/01b24a6c100194bbc8678883f3cd4a53/File/18090339042.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=what+is+a+subject+complement+in+a+sentencePDF 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_off0000ed42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED42 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010554.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10554 17840 bytes
SHA-256: 5d403c6cdcc6148c126bdf06621bcb5df406d64df7fc982ca3b5ad243b8eee80
font_02_sfnt_off00013447.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13447 10904 bytes
SHA-256: 4b1439fbec2098125b4fb37d611a42c52ff87a7bd0c76dac282ddf152d339040

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