Malicious PDF — malware analysis report

Static analysis result for SHA-256 2815aec2d8bb823f…

MALICIOUS

PDF

93.9 KB Created: 2021-09-07 12:09:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 0d5d6fd1bb6f5c0b5b932c1691cdb5f7 SHA-1: 30ac874bd319936fbe7e5cb208991602adebf30f SHA-256: 2815aec2d8bb823fbd344fa709f2beace5c5ad5d59914b406d407e0a144b0fc5
156 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan PDF. It contains numerous links pointing to compromised CMS upload storage and disposable hosting, suggesting a link farm designed to redirect users. The primary purpose appears to be directing users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://andrelandberg.com/userfiles/file/pazazenizipiwepi.pdf In PDF document text
    • http://montesantangelo.it/files/files/juburojedateta.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/89141e85b7f297dcb049b0d7deab33bc/52186972466.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/234040c29a3c7fc1e4dbae3a0ea7b4bd/3436917121.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5f74fd718e---36714545677.pdfIn PDF document text
    • http://grandchainfamilyfoundation.com/clients/85333/File/nasefabazepikewibagolut.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/21a22cbfb2dbf8144fa388682ef9c1d9/rifemopuluz.pdfIn PDF document text
    • https://nestaerospace.com/uploads/file/sisuzin.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/mizoxopatafedu.pdfIn PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/2961b697671f565f0d6e59abf7387794/kaxepixemebumavisinamiwar.pdfIn PDF document text
    • http://amsasecretariat.fr/userfiles/file/nakutokos.pdfIn PDF document text
    • https://vipbeachhouse.com/uploads/editor/file/fipuvojanupivawupoxon.pdfIn PDF document text
    • http://www.village-gaulois.org/gestion/ckfinder/userfiles/files/wimujezexaxoxiwilufup.pdfIn PDF document text
    • http://tulsamemorialclassof71.com/clients/84987/File/58433660232.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/161348e35f26d9---dufolejax.pdfIn PDF document text
    • https://kontiko.com/ktkweb3/images/upload/files/68384415773.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c21b54b6fce---45270709952.pdfIn PDF document text
    • https://ngoctraithaibinhduong.com/uploads/news_file/nelilukibewevixenigen.pdfIn PDF document text
    • https://nhadatonline24h.com/Images_upload/files/58285774670.pdfIn PDF document text
    • https://doanhnghiepvietnam.org/img_duhoc/files/nutoselivasuvajoziju.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098e2f651bf3---45408242370.pdfIn PDF document text
    • https://www.pepinieres-gey.fr/ckfinder/userfiles/files/37778638326.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089d18dc8097---senox.pdfIn PDF document text
    • https://bandai-k.com/userfiles/file/vodababewag.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/46513428703.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=pdf+tkt+module+1PDF 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_off000108fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108FC 10132 bytes
SHA-256: 5b6ecf21b6c98a576b1ee6605520a8555602e5a7a709c13840479e327bc2783a
font_01_sfnt_off00011fbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FBE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000137d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137D0 18892 bytes
SHA-256: d9c97b74c0860f0cb374d7d72aca06b26e4960a2099592b0fed2c823b482aea3

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