Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e6d40c5f7922f6c…

MALICIOUS

PDF

87.1 KB Created: 2021-06-29 12:34:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: e943d32fa31d40e7f28b983977492bc3 SHA-1: 0f57af929ad7368707c6ecd029e99525d8ee110d SHA-256: 5e6d40c5f7922f6c60f1f9c71ec2582f7636aa93825f101e7d665c802ec0bac3
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a link farm pointing to numerous domains, many of which are hosted on compromised CMS platforms or disposable hosting, suggesting an attempt to obscure the ultimate destination or leverage compromised infrastructure. The primary purpose appears to be directing users to potentially malicious websites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://promador.pl/userfiles/file/9956356615.pdf In PDF document text
    • http://polskienarty.pl/data/aktualnosci_imgs/file/89788617300.pdfIn PDF document text
    • http://speakingaboutnetworking.com/ckfinder/userfiles/files/delurevovul.pdfIn PDF document text
    • http://biirbeh.mn/images/content/file/75087919051.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/24565068900.pdfIn PDF document text
    • http://studiogiamberardino.it/userfiles/files/51427190885.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/46u63itpgrk570id59q60r7nak/tinixidajepiropone.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/5gqcu9jbau13f8gnavto3morb7/sibito.pdfIn PDF document text
    • https://elsadaulte.com/ckfinder/userfiles/files/85307769278.pdfIn PDF document text
    • https://boyanbolyarski.com/userfiles/file/80948070550.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b865ac3a0b0---lamokizuzevivitedare.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b55d0e41e3b---10792808563.pdfIn PDF document text
    • http://naturabliskociebie.pl/userfiles/file/95398888005.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/16086af4a9b2c9---70612844461.pdfIn PDF document text
    • https://trellisdundee.com/wp-content/plugins/super-forms/uploads/php/files/749922ea45c82c334a24fd44b713dcbd/92309230085.pdfIn PDF document text
    • http://tasteofruraleurope.eu/upload/File/fabolewodimejolozow.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/cfdec148b8fc5348ad550db9291c5f72/97090695153.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/fb2f1f813aa130f4bcae903a941be4df/73618137578.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091f2c3876f2---69071433273.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c74f3d7a95c---22894121538.pdfIn PDF document text
    • https://lncl.org/ckfinder/userfiles/files/ganarokaliperuwe.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/3b08039faaef65542ab72d4e6b9af646/4502423097.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b09dc4cbec4---memeg.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=bcf27+black+and+decker+manualPDF 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_off0000f02b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF02B 10712 bytes
SHA-256: 95100099100786afdb98015779dd8d259c70a3b94bc21835b9f4f1618d791d32
font_01_sfnt_off000108e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108E2 17508 bytes
SHA-256: 2574a1b53f6515fed54b1aed3283918853ef3f52009771c17e24d31f82eec9f0
font_02_sfnt_off0001371b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1371B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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