PDF malware analysis — malicious · 5cd2b0423ddfb7bd

MALICIOUS

PDF

80.6 KB Created: 2021-09-07 20:58:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 96ce05c81695662a020985715eb59e93 SHA-1: 1f31cbd2d1d50d4ff9cf4b3e7a2e1b93b5de565d SHA-256: 5cd2b0423ddfb7bd3c856242f39d1ebdbc53f862223c07840a8da7971ba030dd

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised websites hosted on disposable domains, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to exploit vulnerabilities or trick users into visiting malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9911

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://oniceh.ru/uplcv?utm_term=plastic+recycling+machine+pdf PDF link annotation
- https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aec61069006---47807108306.pdfIn PDF document text
- http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/3558193768dedacdbe343b510e4a0d05/37568878235.pdfIn PDF document text
- https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef3b7bd51f---30863344183.pdfIn PDF document text
- http://nitexprofi.cz/userfiles/file/33623829692.pdfIn PDF document text
- http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078f0c923e5b---32767514576.pdfIn PDF document text
- http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607675cc26d44---wexudub.pdfIn PDF document text
- http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c11e4854ce1---9456198948.pdfIn PDF document text
- https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16096d4b59c982---48220781597.pdfIn PDF document text
- http://sungsam.net/userData/board/file/dezumenejuxiwimim.pdfIn PDF document text
- http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160aa0ad2c6477---60606112120.pdfIn PDF document text
- https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/16074460fd5ecd---lojalasaxojemilonalotubi.pdfIn PDF document text
- http://fujiya-la.com/uploads/files/xaxugabekinemopexixulekuk.pdfIn PDF document text
- http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/bd8ec006a8c1529d696254b730c4609c/kolixa.pdfIn PDF document text
- http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160acaebbccb7c---janejifadafilub.pdfIn PDF document text
- https://isosklo.cz./uploads/kupevulepebasimurudope.pdfIn PDF document text
- https://www.ccs-corporation.com/ckfinder/userfiles/files/5214083362.pdfIn PDF document text
- http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/f9197dd850b31e2006bf15acffc4722f/dofutimixomodisulufa.pdfIn PDF document text
- https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/8c133e1664953e7a92d6649ea34b23a2/29371115662.pdfIn PDF document text
- http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c31cf27d4d9---lutofunevupikebekigi.pdfIn PDF document text
- https://cuatudongsaigon.net/uploads/files/guganif.pdfIn PDF document text
- https://argentinaproduct.com/ckfinder/userfiles/files/fafifenomupexaxozusitik.pdfIn PDF document text
- http://anm-av.de/uploads/files/wutusezetem.pdfIn PDF document text
- https://taxforce.nl/userfiles/files/18329204813.pdfIn PDF document text
- http://humboldthighclassof79.com/clients/1/19/19f040aad945c40a0acbd79abd3dc6cb/File/29456268552.pdfIn PDF document text
- https://migger.dk/userimages/file/66189756154.pdfIn PDF document text
- http://compufoxmail.com/userfiles/file/19091481792.pdfIn PDF document text
- http://tolltisztitas.eu/userfiles/files/14851958054.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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d3c9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD3C9	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000ebe0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEBE0	11060 bytes
SHA-256: `70fab045c6ebb3f1f69f9c20e41c3f0535dde1affebb5d15a81c5ee5502af03c`
`font_02_sfnt_off0001053c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1053C	18092 bytes
SHA-256: `3be0d716d60b5d52e6e420022bb50183c24dc33db14497e1d7eb5c43bb733861`

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