Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb12287b45c29722…

MALICIOUS

PDF

81.3 KB Created: 2021-09-03 15:12:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 7813a50188cc944fd88194544a63c0f8 SHA-1: 1ac1cdb964c4502f705393f267358e390a0a5379 SHA-256: bb12287b45c2972270d40a2e2a5de4fdc7977fa0cef624fe306f19152cc1bf4f
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://petersonspann.com/clients/3/32/32c4b2f41fa698b5b938e848169c8dcb/File/tawomasizitirevavibolu.pdf In PDF document text
    • http://myucmas.com/userfiles/file/nagogunatogeroforojoze.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612c5aa2a652a---71870522563.pdfIn PDF document text
    • https://qigoodteam.com/uploads/files/202108240406506873.pdfIn PDF document text
    • http://www.siposferenc.hu/html/33284781542.pdfIn PDF document text
    • https://nikoljski.com/ckfinder/userfiles/files/90450390673.pdfIn PDF document text
    • http://costanzolegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/49201035633.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c43c74a0ce5---kimofawapuda.pdfIn PDF document text
    • http://syarmarka.ru/userfiles/files/53123151353.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160ac2bf5368ce---jidugujijituxeta.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/41hg299fr1r0f2f3vn13blke36/47683208931.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/22adf27a485f562475d8f05b03a9a80f/6094393433.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a3d5fe8ba28---61704304549.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/c446cda9da8eeec75fe098b31fb71763/rosaleginolojolovukofirep.pdfIn PDF document text
    • https://oklasik.com/ckfinder/userfiles/files/35823386120.pdfIn PDF document text
    • http://bbfrontedelmare.com/userfiles/files/48019559914.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/ecbf4d665cb546f8b941c97c5efa2484/vapasoluzole.pdfIn PDF document text
    • http://duythuc-bearing.vn/uploads/userfiles/file/lupawezigerizopuramixoda.pdfIn PDF document text
    • https://www.hosotte.com/ckfinder/userfiles/files/duzelogu.pdfIn PDF document text
    • https://licorne-hotel-restaurant.com/userfiles/file/mifenujufananuxano.pdfIn PDF document text
    • http://www.yoko-ono.be/images/userfiles/file/xorawofemugimo.pdfIn PDF document text
    • http://dakhoanhanai.com/images/files/11336425106.pdfIn PDF document text
    • https://tasleemdubai.com/userfiles/files/linoju.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=dolo+definicion+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_off0000d9d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f1ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1EF 10088 bytes
SHA-256: 44f8ee2dc38e708a9a6df0e163059e1b005a8e2671c0dc5ad54303cc303e986b
font_02_sfnt_off0001085b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1085B 18640 bytes
SHA-256: 1c99c234c5c44d363f05e0a2554cf4fed82e5c67377e97d91ca73a6e6742b24f

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