PDF malware analysis — malicious · 14b3dc747944a221

MALICIOUS

PDF

80.4 KB Created: 2021-09-13 09:33:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 8696f33f7e0c5b58396059a2803fafbd SHA-1: b94762222eb737c6ebb1576579536e7cf7d8ca00 SHA-256: 14b3dc747944a221d045404682f7ef27877b9817f5a5616a4aa6f19cd457c9fa

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous embedded URLs that point to various domains, many of which are associated with compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of multiple external URIs and link farm characteristics suggests an attempt to redirect users to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.7642

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
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 https://catamma.ru/uplcv?utm_term=latest+version+cinema+hd PDF link annotation
- http://www.florentmaussion.net/userfiles/File/44298998906.pdfIn PDF document text
- http://hzkontejnery.cz/ckfinder/userfiles/files/99983229816.pdfIn PDF document text
- http://actinq.nl/upload/file/bomutet.pdfIn PDF document text
- http://mamnonkitty.com/webroot/img/posts/files/45716874373.pdfIn PDF document text
- http://yujinpharma.com/upload/files/tamavebub.pdfIn PDF document text
- http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161363c5cdaacf---lesifigubobunide.pdfIn PDF document text
- http://bangladeshceramicsociety.com/uploads/editor/files/62932973385.pdfIn PDF document text
- http://nwhouse.ru/uploads/file/wipof.pdfIn PDF document text
- https://ginniglobal.com/uploads/file/tezevufebop.pdfIn PDF document text
- http://chi-kara.net/userfiles/file/wugukalebulezo.pdfIn PDF document text
- https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/161328bfc2ea40---jevelinonit.pdfIn PDF document text
- https://dogathermalhotel.com/resimler/files/55081385962.pdfIn PDF document text
- http://es-manzokudou.com/yamituki-n/uploads/files/88035451929.pdfIn PDF document text
- http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/161328ce669dfb---bujopuruv.pdfIn PDF document text
- http://brandorbit.in/userfiles/file/nutawevudibafuto.pdfIn PDF document text
- https://ofly.om-digitalsolutions.cn/upload/files/mikepixidafefovikomiwo.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139945c78403---13351296501.pdfIn PDF document text
- http://tofuyatogo.com/uploads/files/mepeponoro.pdfIn PDF document text
- https://cardolf.ro/files/39939125121.pdfIn PDF document text
- https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/p4o8eb9fq1dehekslams60kopm/10576531588.pdfIn PDF document text
- http://deltools.com/userfiles/file/72723881564.pdfIn PDF document text
- https://sahodayabbsr.com/test/fckeditor/file/zuvizatalibagenom.pdfIn PDF document text
- http://hurtglass.pl/upload/file/5242080605.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_off0000df05.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDF05	10612 bytes
SHA-256: `3451a5b85cfe841d8f4c02a853161cc5829442aa47e3c89814c4268256b66303`
`font_01_sfnt_off0000f71f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF71F	17708 bytes
SHA-256: `ebd22283ef092fc4155ec88b1e9c4a07a1948e268cba7919f0896db78e71e2c5`
`font_02_sfnt_off00012546.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12546	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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