Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2ae9e96c325fd93…

MALICIOUS

PDF

103.0 KB Created: 2021-09-02 14:03:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 771e38bc257caa76e2f1dc06d2fd2695 SHA-1: f04b879216b2d015a11df4c7176c769d7297ce8a SHA-256: b2ae9e96c325fd9394caddc9d26163c2603c247eb58c8fb3e688ce328799d45c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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 https://allytemp.ru/uplcv?utm_term=comportamiento+del+consumidor+hoyer+pdf+5ta+edicion PDF link annotation
    • http://brianhaymore.com/images/e/file/jedapikuninomelofule.pdfIn PDF document text
    • http://danburyhighclassof1961.com/clients/b/b4/b42d7d7907ff1a67dd6fd366dd3c6775/File/98904055470.pdfIn PDF document text
    • https://reazfarah.com/ckfinder/userfiles/files/37407286983.pdfIn PDF document text
    • https://nikosdimos.gr/userfiles/file/17350812296.pdfIn PDF document text
    • https://detectagsafety.com/ckfinder/userfiles/files/lawaxe.pdfIn PDF document text
    • http://onlytech-tunisie.com/userfiles/file/fodige.pdfIn PDF document text
    • http://www.bash.cl/media/file/jaxuvim.pdfIn PDF document text
    • http://stl-hk.net/userfiles/wolevaxosiwamusunevojomo.pdfIn PDF document text
    • http://amdind.com/userfiles/file/kudabedesosojuka.pdfIn PDF document text
    • http://goergenpainting.com/clients/0/0d/0d1038892961fdbf96b6a8e7e8daca8f/File/367706735.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b3a7bedcf7---11133046690.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/161110c50210a3---norimodavaleto.pdfIn PDF document text
    • http://testplanet.nl/uploads/files/vufirisomabudanujim.pdfIn PDF document text
    • https://badrivishal.com/media/59672074941.pdfIn PDF document text
    • https://tanhoaphat.vn/userfiles/file/wavofipugiturusezot.pdfIn PDF document text
    • http://cravaluos.com/ckfinder/userfiles/files/lulexilotegugisavubodu.pdfIn PDF document text
    • https://lasanisports.com/files/55183184550.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/zawiwirobidebulerekedokuw.pdfIn PDF document text
    • http://vizugy.hu/uploads/files/files/jiloroxisugapobokefap.pdfIn PDF document text
    • https://colakcivi.com/userfiles/file/wopegijarupor.pdfIn PDF document text
    • http://avtrak.ru/ckfinder/userfiles/files/93434202770.pdfIn PDF document text
    • http://hoteldanang.vn/uploads/images/files/xonevukejariwepezetunuva.pdfIn PDF document text
    • http://legendtec-eg.com/wp-content/plugins/super-forms/uploads/php/files/fvjc4398e0m50fncvai7cc45a0/75930675534.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b56e2b81d10---zirojipagaxuso.pdfIn PDF document text
    • 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_off000125fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125FD 11264 bytes
SHA-256: 119b7f60b4ced194d624c23476a344fc85f334b572e384f69d82900026193765
font_01_sfnt_off00014048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14048 20928 bytes
SHA-256: 9d714dffdddaacccdda718c0f1159dfbe1d792810ef79fb18f5bd8269e80c3d3
font_02_sfnt_off00017596.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17596 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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