PDF malware analysis — malicious · 75260877f72f2a1d

MALICIOUS

PDF

81.1 KB Created: 2021-09-06 00:59:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 0fe763c635ff4e964088f6e941c322c5 SHA-1: 4f2239df16a95d70e8b0c924de5dc39092bfa385 SHA-256: 75260877f72f2a1d64d21d895d9099f5b95f3bd711e89d2cc955167be835fb27

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The PDF contains numerous links, many pointing to disposable hosting and compromised CMS upload directories, indicating a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users into clicking on these links. No scripts were extracted, but the structure and URL analysis point to a phishing or redirection attack.

Machine Learning

Nyx PDF Classifier malicious score 0.9949

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://realxenon.ru/uploads/files/97922602830.pdf In PDF document text
- http://boilerservis.ru/uploads/files/zujupuxavapil.pdfIn PDF document text
- http://www.zywawiara.pl/pliki/loluxutoluso.pdfIn PDF document text
- https://bedandbreakfastchia.it/userfiles/file/49921373058.pdfIn PDF document text
- https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16071fce46e5d8---664966106.pdfIn PDF document text
- http://adabaskimerkezi.com/upload/file/zuxinaw.pdfIn PDF document text
- https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/kqofo3n6c9sn309a8k7saoq04s/gipiwimuwumozilabuwot.pdfIn PDF document text
- http://hajnysport.cz/FCK_userfiles/file/2012110607.pdfIn PDF document text
- https://tigaintan.com/contents//files/72995775514.pdfIn PDF document text
- http://dailitara.lt/bites/uploads/file/2232992975.pdfIn PDF document text
- https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/172833c2dcc35d821b41dbd4b9735f84/bipakinomixojo.pdfIn PDF document text
- https://castel.ro/userfiles/file/labotuvigadozubifur.pdfIn PDF document text
- http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607153a4dfcad---65495294682.pdfIn PDF document text
- https://saam.vn/images/content/file/lowexomafarirebek.pdfIn PDF document text
- http://studiospazioambiente.it/userfiles/files/mebekepol.pdfIn PDF document text
- http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b5e771ab52a---661450098.pdfIn PDF document text
- http://physocare.com/Images_upload/files/bilov.pdfIn PDF document text
- https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/311b64a9322bf6efa060fad2e5993992/27184434236.pdfIn PDF document text
- https://forthepeoplegov.com/userfiles/file/13663061321.pdfIn PDF document text
- http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160987eb0db4f2---2673621625.pdfIn PDF document text
- http://pwmtqatar.net/userfiles/file/nuwexararuwimomeve.pdfIn PDF document text
- http://huyminhplastic.com/upload/files/57137651991.pdfIn PDF document text
- http://seashoresilverlabradors.com/clients/4/48/482fd9669fb3260065120a60ccac5e48/File/vogubabolujuvufut.pdfIn PDF document text
- https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/002883da9101de3c1ace829d8fa723f8/88136209491.pdfIn PDF document text
- http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608129c92ba29---kobepomex.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=makalah+senam+ritmik+pdfPDF 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_off0000db4c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDB4C	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f35e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF35E	16724 bytes
SHA-256: `7eb23184c85e1ef3cb978109f3179dfd1ec71adfe18ad3d59aee8fdacabd1306`
`font_02_sfnt_off00011e88.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11E88	10728 bytes
SHA-256: `b404a3f9870e451307414695bf1f3cdd33862eeba6df06bb03eef7ca97704358`

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