PDF malware analysis — malicious · 41bd5675fe1d2a85

MALICIOUS

PDF

111.7 KB Created: 2021-09-02 05:48:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 09ff548d3961b941152038c7e82c1f6a SHA-1: 601a5afee3a36f4fca2c731a706805008e2e2ddb SHA-256: 41bd5675fe1d2a858cbf5b5bb01099ef8aa9cba096eda79d296f7ecf08814080

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a link farm pointing to numerous compromised WordPress sites, indicating a phishing or redirection campaign. ClamAV detection as Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 further supports its malicious nature. The file's primary function appears to be directing users to malicious content hosted on these compromised domains.

Machine Learning

Nyx PDF Classifier suspicious score 0.3933

Heuristics 5

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
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://flexi-cms.com/uploads/file/dafibugotitilev.pdf In PDF document text
- https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609f1e5dac4d1---ledenexibokuviwimopupora.pdfIn PDF document text
- https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/1612a6d8b81f7c---xomerededupirulujumuzo.pdfIn PDF document text
- http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b8b7fba69c3---xemobinadexogufujoja.pdfIn PDF document text
- http://sosnovgeo.ru/userfiles/file/lunegepidalijazinitav.pdfIn PDF document text
- http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/c764fbd58af93cdb2289afcfdd72c1e5/57113988450.pdfIn PDF document text
- http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16087718d7e232---26562718467.pdfIn PDF document text
- http://atreve.eu/ubezpiecz/obrazy/file/2133384671.pdfIn PDF document text
- http://uleshuzatshop.hu/files/file/kulifotixebamozunedade.pdfIn PDF document text
- https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/deg9f68295ohqu78f2t071ie4f/xalolikajilukidigodijika.pdfIn PDF document text
- https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab5a1e4a1fc---gufujakaburiwur.pdfIn PDF document text
- http://n-production.com/upload/fckeditor/file/92448691402.pdfIn PDF document text
- https://gikguamerica.com/userfiles/file/fixetipesep.pdfIn PDF document text
- https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/e4ea2152c19533bd47d3af261324c870/60120403519.pdfIn PDF document text
- https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/d0a2f21606055e8d05a0914b9a497f22/47381316058.pdfIn PDF document text
- https://equalland.com/uploads/File/badodogirolitepi.pdfIn PDF document text
- https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/0t4bql4uq1utc1mneksui2uq3l/81078841378.pdfIn PDF document text
- http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608043feac02f---57252820918.pdfIn PDF document text
- https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c26f53bbfc---48409329148.pdfIn PDF document text
- http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/6evo3mpm0cp06qlmulpkp00si2/juruseratuwose.pdfIn PDF document text
- http://geredekombiservisi.com/userfiles/file/74913040615.pdfIn PDF document text
- https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/16080fa1ee9adb---78783437416.pdfIn PDF document text
- https://encoyun.com/calisma2/files/uploads/91375977609.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=ffxiv+level+60+weaponsPDF 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_off000160a2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x160A2	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off000178b4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x178B4	19772 bytes
SHA-256: `89ef7f09f592996cd0909420b91c8bafc68ddbfa8e5dcf7017ab8666646b72a9`

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