Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e0f581cc05649e4…

MALICIOUS

PDF

70.0 KB Created: 2021-09-29 04:07:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 0a5cd0edef98bcdd0fbc2187f9f390a1 SHA-1: f50a30505821d9ecf645b6dab9c8583a8ba55233 SHA-256: 8e0f581cc05649e450d1f8e4e5e307b765c9f74c850cf14a41e76c8c594f6ba4
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains numerous links pointing to potentially compromised WordPress sites and disposable hosting, suggesting an attempt to redirect users to malicious content. Although no scripts were explicitly extracted, the PDF structure and link farm indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 70 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://foodvellythailand.com/upload/files/tisagabivajowogun.pdf In PDF document text
    • http://lejuriste.ru/files/file/joxugofuk.pdfIn PDF document text
    • http://morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137d7f87645d---22065169696.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/161464f3e9f002---roletujuliwexitikobunolug.pdfIn PDF document text
    • http://087334211.kad.tw/kads/ckfinder/userfiles/files/21742917552.pdfIn PDF document text
    • https://yensaovinastar.com/media/files/76210480477.pdfIn PDF document text
    • http://perfekt-dom.pl/designhome/admin/userfiles/file/33805959129.pdfIn PDF document text
    • https://dreamscapes.ca/dream_scapes/userfiles/files/jurano.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/6c49abdd9330ec203f7aff0128161f23/50169333593.pdfIn PDF document text
    • https://kaimano.it/file/tejademijerobu.pdfIn PDF document text
    • https://jck.ro/userfiles/file/43198839780.pdfIn PDF document text
    • https://cplastik.eu/data/cms/file/dewaluvabufabipif.pdfIn PDF document text
    • http://seoulmenu.com/uploads/files/fobaxedade.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613820303bfab---vazilimuruwajezetad.pdfIn PDF document text
    • https://icrs-as.com/userfiles/file/87066417099.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/16151a91686da3---sinosuzorogimerura.pdfIn PDF document text
    • https://deltaguvenlik.net/userfiles/file/34705247479.pdfIn PDF document text
    • https://nhaccugiare24h.com/uploads/userfiles/file/bupeviludazi.pdfIn PDF document text
    • http://citranco.com/users/files/jenedikijoxiwetunadujozik.pdfIn PDF document text
    • http://dailyliving.nl/ckfinder/userfiles/files/95379830443.pdfIn PDF document text
    • http://ipsgroupjjn.org/userfiles/file/63741972240.pdfIn PDF document text
    • http://debseven.net/UserFiles/File/fupafunobanigogugomez.pdfIn PDF document text
    • https://robustbrakes.com/administrator/imagetemp/file/46044798024.pdfIn PDF document text
    • https://feniks9.ru/ckfinder/userfiles/files/fikirolemu.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614fdf06c35b9---mepidibaparog.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=how+to+change+your+name+on+facebook+android+appPDF 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_off0000b344.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB344 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cb5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB5B 11376 bytes
SHA-256: 4b72292558dcd782f1c01dfc8f0aec2f43ba803d5c8eb992617ad9a61ba2540d
font_02_sfnt_off0000e592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE592 13780 bytes
SHA-256: d72c544d970af0a01e4871cd436356856a426d9233a9a653eef41248eaaa2fa8

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