PDF malware analysis — malicious · 3ed77f3514af8e11

MALICIOUS

PDF

80.3 KB Created: 2021-07-08 22:53:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: 0644edb7fe603d3e423c0c0e14bac376 SHA-1: dd82d9fcc96ffc3bd98b5dbbdd3d8e00db0a82eb SHA-256: 3ed77f3514af8e11d490ccfd77f7dc7a5a0488a11d9468ab0a4de4be8d9a856a

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample was detected as a phishing trojan by ClamAV. Static analysis revealed it functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other domains. These links likely lead to further malicious content or phishing pages, aiming to trick users into revealing sensitive information or downloading additional malware. No scripts were extracted, and the document body was unreadable, limiting further analysis of the specific lure.

Machine Learning

Nyx PDF Classifier suspicious score 0.4268

Heuristics 5

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
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://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1608a2ee783521---90910322763.pdf In PDF document text
- http://amctop.com/board_data/editor_img/file/202106051613.pdfIn PDF document text
- https://alutat.com/data/file/95196036133.pdfIn PDF document text
- http://englandmatchshirts.com/assets/file/divivuponeralu.pdfIn PDF document text
- http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1607b96d0e92ce---1338391625.pdfIn PDF document text
- https://dm288.rs/slicice/file/wajureroxegazemuvave.pdfIn PDF document text
- http://wijnhuis-vaessen.nl/site/data/ws/files/sakuga.pdfIn PDF document text
- http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160b03a52e08e0---xikinirunemuda.pdfIn PDF document text
- http://kayamedbursa.com/userfiles/file/52006302871.pdfIn PDF document text
- https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bf2f739da4---79001075968.pdfIn PDF document text
- https://mkontakt.pl/dat//file/48305369647.pdfIn PDF document text
- http://chrisdepanneservices.fr/Sites/cds/files/34297741155.pdfIn PDF document text
- https://ludifrance.fr/userfiles/file/56058977460.pdfIn PDF document text
- http://www.allatpatikapecs.hu/images/file/roxodufamib.pdfIn PDF document text
- http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/5ecd586607ec800c9da7e438189236e9/66042500053.pdfIn PDF document text
- https://giriconsultancy.com/content_files/files/zovujagizabilujebisukuku.pdfIn PDF document text
- http://zxpgw.com/userfiles/file/89527615053.pdfIn PDF document text
- http://nawooelcs.com/upload/userfiles/2021/06/files/210607145254.pdfIn PDF document text
- http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607de6303a521---zetizizo.pdfIn PDF document text
- https://burlingame.com/wysiwygfiles/file/pogoda.pdfIn PDF document text
- http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa4b1ed705a---zurotivotesimazene.pdfIn PDF document text
- http://associatedreclaimed.com/userfiles/files/gasarupabojonuzanujegu.pdfIn PDF document text
- http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092c6d96284c---dawutoper.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=high+power+distance+culturePDF 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_off0000dd7b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDD7B	18112 bytes
SHA-256: `f9325143ebf4283f2aa8ebe24b7bbb9fb144b4b1525ebeb7247526f247c21979`
`font_01_sfnt_off00010bd0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10BD0	10968 bytes
SHA-256: `63eed44878bcd5e41d83e81fce517fc149f1b9b54d9edc313326146d635e7817`
`font_02_sfnt_off00012505.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12505	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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