PDF malware analysis — malicious · 45a0f80b90d23caa

MALICIOUS

PDF

78.2 KB Created: 2021-09-01 09:34:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29

MD5: c21e713187def886bb8e8b88dea3619d SHA-1: 4ce17d0bfa6b92705e34dafdfed2f7cfa5bf2e15 SHA-256: 45a0f80b90d23caaeb9716fa423183f2c10f1b2658ee65a0489e2ad5820d10dc

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links, many pointing to compromised WordPress upload directories or disposable hosting, suggesting a link farm designed to redirect users. The primary purpose appears to be directing users to potentially malicious external sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9941

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://catamma.ru/uplcv?utm_term=mountain+home+commissary PDF link annotation
- http://bamila.vn/luutru/files/75499554758.pdfIn PDF document text
- http://nicenpos.com/userData/board/file/13508149599.pdfIn PDF document text
- http://robfredo.com/userfiles/file/zoraf.pdfIn PDF document text
- http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1381db540---puvavafoke.pdfIn PDF document text
- http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c77ec9bb52---gosibaj.pdfIn PDF document text
- http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a833ab92d01---8711605391.pdfIn PDF document text
- https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161217fdfe9c45---29685329319.pdfIn PDF document text
- http://jandenzobv.com/image_uploads/file/89673785733.pdfIn PDF document text
- https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/ccfe316a30f8e0d91a405c08493860ad/rilidesapodoxogekozikuve.pdfIn PDF document text
- http://vijyaiprismcrm.com/userfiles/files/30739459948.pdfIn PDF document text
- https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/7a6e8252be169d76bb4c0796a97b0904/foxaxojuxomadanitim.pdfIn PDF document text
- https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/13e0969e1fcb77074754f64346da875f/38545824932.pdfIn PDF document text
- http://pettwayfamilyreunion.com/clients/39389/File/zegewebujefenonurunij.pdfIn PDF document text
- https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/2lsb8uhp6og03fqdhpra4r9n1n/gugeraragibe.pdfIn PDF document text
- https://ckmusicdesign.nl/userfiles/file/52435197152.pdfIn PDF document text
- http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612394bc6caba---gebikigajodit.pdfIn PDF document text
- https://kaimano.it/file/92856338254.pdfIn PDF document text
- http://automotiveenergy.cz/userfiles/file/tekerux.pdfIn PDF document text
- https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/d0265aa88c7aecff264e8959766fc455/pasuni.pdfIn PDF document text
- http://simmsfamilyreunion.com/clients/9/98/98d47f1658d09d39d77ba56043454c9c/File/93361309175.pdfIn PDF document text
- http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd4a31a2aa---10463340837.pdfIn PDF document text
- http://meruzhankhachatryan.com/app/webroot/files/file/63987227525.pdfIn PDF document text
- https://sfeerweter.nl/userfiles/files/banebazamonosulidov.pdfIn PDF document text
- https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/605c7c08dc2507b3c54ce3288713f82d/mefusowimaxuzopopip.pdfIn PDF document text
- https://kitapkapla.com/upload/ckfinder/files/nobutire.pdfIn PDF document text
- http://greenmodels.ru/uploads/files/senewarusufuvavi.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_off0000cde1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCDE1	10656 bytes
SHA-256: `2ddc4df90dbf34d75f962d20bc446073c16dbb9e84bc99d16484407b9186a7be`
`font_01_sfnt_off0000e62c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE62C	16872 bytes
SHA-256: `e9c15d55ca1801dd7b43baffdc36f66001355ce9fb8169cade601cb0afc88c62`
`font_02_sfnt_off0001122e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1122E	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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