PDF malware analysis — malicious · 2c59b7a38dbf642a

MALICIOUS

PDF

67.8 KB Created: 2021-09-01 18:00:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: 3c58881d2bfc6472e40ed6b6d0b98b4d SHA-1: 0b00dade988b6686d3e1244b7e99fefeb2bcc51d SHA-256: 2c59b7a38dbf642a0afb19c0b7c292d881188adfed11dafdad6caab28cb6cfe3

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to various domains, many of which are hosted on compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to potentially harmful sites.

Machine Learning

Nyx PDF Classifier malicious score 0.7934

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 http://cuacuondaiphuc.com/upload/files/22765628208.pdf In PDF document text
- https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/777333a693d2a69cfc0ae0171d71866f/zerejonamufofezid.pdfIn PDF document text
- https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c21974f655---81048083950.pdfIn PDF document text
- http://ji-tien.com/userfiles/file/mobujagazoxusawix.pdfIn PDF document text
- http://hoitruyengiaocodocvietnam.com/uploads/image/files/62696812948.pdfIn PDF document text
- http://inglewood1968.com/clients/68690/File/65389803170.pdfIn PDF document text
- http://khiconghoixuancong.com/Khicong/admin/userfiles/file/vurunenodatazidil.pdfIn PDF document text
- http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/2f6197c107368476438a248a17ea97d7/luvizomitusomidedewal.pdfIn PDF document text
- http://goteneplast.se/files/images/file/xulasopiwanebujifaxuz.pdfIn PDF document text
- https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/1b3458b27e8565c3d5817d26503c94d2/penonizatexogiverizopal.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8f4141229d---31150086406.pdfIn PDF document text
- http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160943771c39f7---82626597067.pdfIn PDF document text
- http://npxbyy.com/wang3_3_10_27/Upload/Upload/file/2021531527266366.pdfIn PDF document text
- http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/16079abe4c5603---gimiwalubunevaru.pdfIn PDF document text
- https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/1a6d30f53e07dd56438f4a713a1a25c8/41418064282.pdfIn PDF document text
- http://uitvaartverzorgingsindex.nl/images/uploads/38211201471.pdfIn PDF document text
- http://safetyassessmentsolutions.co.uk/ckfinder/userfiles/files/34509789521.pdfIn PDF document text
- http://langmypham.com/luutru/files/ruxobozujefexit.pdfIn PDF document text
- https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/315d7952a799fe255c3f132c239267f6/36497808161.pdfIn PDF document text
- http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079437a553e1---34199125475.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=best+songs+of+celine+dion+mp3+free+downloadPDF 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_off0000b5e6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB5E6	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000cdf8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCDF8	15892 bytes
SHA-256: `ee26edfcf5b550f4bdd593fd300503e36a0169f38a73618c1374a3c1ebc8ecb1`
`font_02_sfnt_off0000f683.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF683	11276 bytes
SHA-256: `711cc444c22df2d4300ae14dd1bef42959c71db372954cb63111ab1f95e0bcb5`

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