PDF malware analysis — malicious · 9b993214ea48c809

MALICIOUS

PDF

73.4 KB Created: 2021-09-21 09:52:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23

MD5: fc2a2a56234f11fba84ae4b244c4969f SHA-1: 274b16877f3262b5dc9a5a82ebe59c836e51eab8 SHA-256: 9b993214ea48c809aae4c747f4d4121284ba1e7fe54660f85f4524491e92958e

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and exhibits characteristics of a link farm. Multiple heuristics indicate the PDF contains numerous links pointing to various domains, some of which appear to be compromised CMS uploads. The embedded URLs suggest an attempt to manipulate search engine results or redirect users to potentially harmful content.

Machine Learning

Nyx PDF Classifier suspicious score 0.4435

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
PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED

The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
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 http://ballmillfactory.com/d/files/zajififuvidew.pdf In PDF document text
- http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1613f4fb24a68b---nuvurot.pdfIn PDF document text
- http://porpora.group/imagenes/imagenes_contenidos///jiwizejofolusoviregijigu.pdfIn PDF document text
- https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161385c0d074cf---legugeramulapawikokijagov.pdfIn PDF document text
- https://jairdefreitas.com/ckfinder/userfiles/files/lopixufuzesokojozomimiju.pdfIn PDF document text
- http://cu-mbc.com/ckfinder/userfiles/files/jujipilapevalejeparoxegu.pdfIn PDF document text
- https://beauti-full.ru/uploads/files/tituwawewedema.pdfIn PDF document text
- http://indianspringhomes.net/userfiles/files/gifugedubureruxobo.pdfIn PDF document text
- http://dallard.fr/ressource/site-image/files/35662820688.pdfIn PDF document text
- http://ordineveterinarivenezia.eu/userfiles/files/83582638086.pdfIn PDF document text
- http://forma8.kz/ckfinder/userfiles/files/fosorovubosoguzuzirafeguv.pdfIn PDF document text
- https://zifu-tech.com/app/webroot/userfiles/files/87138255281.pdfIn PDF document text
- https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1612fa9e759332---94756127451.pdfIn PDF document text
- https://renebeumer.nl/userfiles/file/31970867104.pdfIn PDF document text
- http://myxroad.net/upload/userfiles/file///98913525155.pdfIn PDF document text
- http://riverside-plaza.com/upload/userfile/files/75352466249.pdfIn PDF document text
- http://alacarte-husum.de/userfiles/file/serizuf.pdfIn PDF document text
- https://jnvhardoi.org/ckfinder/userfiles/files/xikujonexowuvorunega.pdfIn PDF document text
- https://clinicaabrahaoosta.com.br/ckfinder/userfiles/files/govupodu.pdfIn PDF document text
- http://elektro-galerie-hamburg.de/userfiles/file/92073855506.pdfIn PDF document text
- https://magyar-logyogyasz.hu/fileok/file/bafano.pdfIn PDF document text
- http://tabletopad.com/images/file/baripetedupukebofugezotid.pdfIn PDF document text
- http://parquet-cortes.fr/data/Files/lusuzametusimag.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=watch+love+after+lockup+season+2+online+freePDF link annotation
- 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_off0000c38e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC38E	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000dba5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDBA5	10948 bytes
SHA-256: `d764cdbdc8b6afc9ccdbf46f9d33458db65b5156f71c71e6f60222e872db867c`
`font_02_sfnt_off0000f517.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF517	17416 bytes
SHA-256: `f9a0b8cf5e8e6b00c9664d3d5cfc34fd022d424614cea4dedc01544d2a091740`

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