PDF malware analysis — malicious · 321740d41e2bb001

MALICIOUS

PDF

77.6 KB Created: 2021-07-13 23:52:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: e757f4673101693743cada11a08f6658 SHA-1: b377d41437cb049164fb0e9a5c4e5250adf78489 SHA-256: 321740d41e2bb001f5337e4abe3f27e8e68c2ce8c6a361742a7c7e92324c86ce

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It functions as a link farm, containing numerous URLs that point to compromised WordPress upload storage and other disposable hosting sites. These links likely lead to the download and execution of further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.6966

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://tuoitre.bacgiang.gov.vn/lib/ckfinder/files/xekobuzesoxiderofokodoroj.pdf In PDF document text
- https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160867379622f8---pekijedage.pdfIn PDF document text
- http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ac95694e2b7---vopejagagazumizito.pdfIn PDF document text
- http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609210c2d1234---damisudijimilewumiresik.pdfIn PDF document text
- http://jdjcnc.com/upfolder/e/files/20210712222155.pdfIn PDF document text
- http://xn--80aejmo0alc.xn--p1ai/ckfinder/userfiles/files/98755469524.pdfIn PDF document text
- http://phsbulldogs1966.com/clients/8/87/87911cb64b10f66d93d15f7b6e22d365/File/20675512355.pdfIn PDF document text
- http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/66b8286a77fc45e37e1f460556393939/97303253067.pdfIn PDF document text
- http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608808e22f31d---45077960487.pdfIn PDF document text
- http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085220ed7118---kakabu.pdfIn PDF document text
- https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/e7d4175c9cc42ffd177ce9c2236b4862/xatemitobapofaxup.pdfIn PDF document text
- http://fujavietnam.com/images/Download/sewivomatifuwonu.pdfIn PDF document text
- http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c74f5d21a01---33903303805.pdfIn PDF document text
- http://christopherdallo.com/file/bulitanezosajize.pdfIn PDF document text
- http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160906a2f81d54---rijiniluveba.pdfIn PDF document text
- http://nebovsem.ru/app/webroot/files/files/74347102708.pdfIn PDF document text
- https://cplastik.cz/data/cms/file/nowexagota.pdfIn PDF document text
- https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609782fb15efc---dijatexodanuvep.pdfIn PDF document text
- https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b70f278e0a7---rofowuso.pdfIn PDF document text
- https://valleyrestoration.net/home/apf/public_html/ckfinder/userfiles/files/97170274542.pdfIn PDF document text
- https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/620ac833c50821399d2060ce35aa64e3/bupudiwib.pdfIn PDF document text
- https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aff0f8ea769---9675235548.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=couple+handprint+paintingPDF link annotation
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e99f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE99F	10636 bytes
SHA-256: `fa4b754e9de2702ba1a4cdc78d842478c6ef3439c891cc2fd5228d928407e7ba`
`font_01_sfnt_off000101a4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x101A4	19320 bytes
SHA-256: `2bc37e6502564002b1a5dc6455f3a67ee56026bec8b6928fe4b3d7704393b692`

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