PDF malware analysis — malicious · bc196376e863a017

MALICIOUS

PDF

80.4 KB Created: 2021-09-22 20:27:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-03

MD5: 1f10d3016d114735f3285540f734d47f SHA-1: ee207fb5f0e87935dcfa125dfe7579ba293ca98c SHA-256: bc196376e863a017672abcc9e1afc7fc17b0d3526ebefd35c6afbe6ace04b097

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The `utm_term` parameter in one URL indicates a potential phishing lure.

Machine Learning

Nyx PDF Classifier malicious score 0.8327

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: PDFException. 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 https://crewmak.ru/uplcv?utm_term=zili+funny+video+download+status PDF link annotation
- https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/ncqoag6g8k4ipu4nq5v7vqmdas/45220820575.pdfIn PDF document text
- http://ketphatthinh.vn/upload/files/7246263391.pdfIn PDF document text
- https://billionbosses.com/ckfinder/userfiles/files/jijimaxusuwotisuzupobe.pdfIn PDF document text
- http://cs-golfclub.com/ckupload/files/57116425578.pdfIn PDF document text
- https://www.agcontraincendios.es/ckfinder/userfiles/files/85169340967.pdfIn PDF document text
- http://aiaato.com/FileData/ckfinder/files/20210921_1E19193CCF76F297.pdfIn PDF document text
- http://mexxeopaint.com/upload/files/73193661864.pdfIn PDF document text
- http://fantasymusic.it/userfiles/files/genewuwakidomopezofejig.pdfIn PDF document text
- https://www.jnvhardoi.org/ckfinder/userfiles/files/welejaxifelabufilalazapi.pdfIn PDF document text
- http://elmbbq.com/uploads/files/46528305000.pdfIn PDF document text
- https://wecareprogram.org/images/file/tigat.pdfIn PDF document text
- http://audiohrestomatiya.ru/content/file/90508874955.pdfIn PDF document text
- http://almar-bus.pl/userfiles/file/getuguxoduwumafexaguk.pdfIn PDF document text
- https://makiriaszto.hu/ckfinder/userfiles/files/37756823967.pdfIn PDF document text
- http://xn--2osv9pt2jfpt.com/uploadfiles/files/87529914341.pdfIn PDF document text
- https://luatkhangthai.vn/upload/fck/file/lirawarexonema.pdfIn PDF document text
- http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16149095d0bac0---wexivisajowilalodiji.pdfIn PDF document text
- http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/ba2r4in4vg8g9s8nblhlatkpv0/2824114633.pdfIn PDF document text
- http://xn--q20b13r9leepaeb.net/upload/file/202109132100477869.pdfIn PDF document text
- https://clubsecurite.fr/webroot/upload/files/sepoguma.pdfIn PDF document text
- https://exlite.it/ckfinder/userfiles/files/96326711861.pdfIn PDF document text
- http://steakpluspizza.us/userfiles/file/61129512586.pdfIn PDF document text
- http://kabaretyimpresariat.pl/Upload/file/vukofuki.pdfIn PDF document text
- https://viceda.com/userfiles/file/52217970580.pdfIn 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_off0000ddda.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDDDA	18036 bytes
SHA-256: `6077534e353209a4d065d897c36597df801955b8fdfc52ef53382afed5e8ad66`
`font_01_sfnt_off00010c98.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10C98	10576 bytes
SHA-256: `5ae531caaca12e61b2a4bb85e13c63dae1dd2790591e902d396b85e22c50330e`
`font_02_sfnt_off000124ef.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x124EF	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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