PDF malware analysis — malicious · 59cdf124f2ecb2af

MALICIOUS

PDF

98.5 KB Created: 2021-06-30 07:06:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20

MD5: 2a1df72e9fb8bbf57f0a065a569833fe SHA-1: ec5b30809110374ee2db69ca9f3bbfb4bfd7a746 SHA-256: 59cdf124f2ecb2af780ea3f18ed2163a7293bb5a141ea60e778ecd3b322410d1

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to compromised CMS upload storage and disposable hosting. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to potentially malicious sites, likely for phishing or malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9928

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://insights3.com/wp-content/plugins/super-forms/uploads/php/files/38e427fd382f50a26a3aa13d1eeb1c16/zegukikuxodoja.pdf In PDF document text
- http://crmrealty360degree.in/userfiles/file/79590295957.pdfIn PDF document text
- https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/796e3284a391add6aa4583ab130c94ba/69025081189.pdfIn PDF document text
- http://gtshotel.it/images/file/9451449713.pdfIn PDF document text
- https://cooperspick.com/files/32041672188.pdfIn PDF document text
- https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160770161dee8e---nupegegejolexaditekujix.pdfIn PDF document text
- http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/l1hlc4pvb4l0njknp49dqfki36/77407821958.pdfIn PDF document text
- https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/f1c30b31a9d91cdf0820eb7d9af07aec/kenox.pdfIn PDF document text
- https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/5ea4e1c2fe35e46a74d06581896761b6/82141249007.pdfIn PDF document text
- http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3af4ae1d3---9731564394.pdfIn PDF document text
- http://maxkbm.com/clients/2/28/28fcaa936e2ecbeb6c9a97ea0f1ab253/File/sezefefekemizu.pdfIn PDF document text
- https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094643e11277---naworaxo.pdfIn PDF document text
- https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607adec6b021b---39443637727.pdfIn PDF document text
- https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/af2a92e4iomjarus248u9gmgtf/rovawomedef.pdfIn PDF document text
- https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/ffc8c2261f8a37c62601dcb86a5eb3e7/kudazudimutugebur.pdfIn PDF document text
- http://www.cerathai.com/image/upload/File/16695714119.pdfIn PDF document text
- http://trendymamy.pl/userfiles/file/vebizubimerasawajorepogo.pdfIn PDF document text
- http://mtlebanon62.com/clients/5/5e/5ee551a8be14a26d7d76bc5e90dd1372/File/wowodode.pdfIn PDF document text
- http://allprintusa.com/admin/images/file/vodanefimarikijigemem.pdfIn PDF document text
- https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608fe528693c0---6105901124.pdfIn PDF document text
- http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/ecd7f188bbe5c27c0fc3662e3fd68aab/53029383967.pdfIn PDF document text
- http://muzeumostrowiec.pl/obrazy/file/2855229633.pdfIn PDF document text
- https://afayl.com/userfiles/file/lubokopozejojilarivafebas.pdfIn PDF document text
- http://446888.top/userfiles/file/wetiduxeroke.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=mechanical+terms+dictionaryPDF 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.

Filename	Kind	Source	Size
`font_00_sfnt_off0001209b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1209B	16868 bytes
SHA-256: `07ed149f3efb72b151deca7fa74d62f0860cd7850b951db953117738b80fe480`
`font_01_sfnt_off00014c34.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14C34	10740 bytes
SHA-256: `218dcc9794dc370ce4069fe86af1700919ec56daf2050e33f02c08ba50a2269b`
`font_02_sfnt_off000164b8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x164B8	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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