PDF malware analysis — malicious · 4743b281b522f90c

MALICIOUS

PDF

72.1 KB Created: 2021-08-27 23:32:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: d6d8831332e9000ee0b284d67b17b41d SHA-1: 2886bb05d2d97fe6d6db802b023597704cf6612e SHA-256: 4743b281b522f90cc78d5b6ea81219e8c9315e3ae14a6baf457fe5211b4efe12

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to external websites, many of which are hosted on compromised CMS platforms or disposable hosting, indicating a link farm designed to obscure the final destination. ClamAV detection and ML classification strongly suggest malicious intent, likely phishing or malware delivery. The presence of multiple compromised upload links suggests an attempt to leverage these to host or distribute malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9044

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://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abfe3f5c958---sumudituxofiso.pdf In PDF document text
- http://niestachow.pl/data/aktualnosci_imgs/file/24275919185.pdfIn PDF document text
- http://mlsy.cz/images/file/files/56310478822.pdfIn PDF document text
- https://bawwabatrizq.com/userfiles/file/25588269244.pdfIn PDF document text
- https://area34.info/wp-content/plugins/super-forms/uploads/php/files/83hvsl3k28v5ic8qi8urq9pca0/lodod.pdfIn PDF document text
- https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/d5626f8ea04e65f5263b5fc9305dc121/75678936929.pdfIn PDF document text
- https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/6dc51f96d27a660c5e0a1862bd8378ef/xawexajisudijurufuwixab.pdfIn PDF document text
- http://nutranghongngoc.com/media/ftp/file/4309092726.pdfIn PDF document text
- http://fxmeat.com/upload/file/acba1b7282b622d2d4271c8d5d9b6010.pdfIn PDF document text
- https://minhvuongthuphap.com/upload/ck/files/nomedirip.pdfIn PDF document text
- https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/9s74ed6t0hdt2sicv53uhvhbr0/39311652105.pdfIn PDF document text
- http://cesishotel.lv/res/wysiwyg/file/57621224872.pdfIn PDF document text
- http://goldenbaycruisesagent.com/userfiles/file/85447253778.pdfIn PDF document text
- https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/6q5l2vh0ofilh52im03drlejdk/gunokam.pdfIn PDF document text
- http://asremajazi.com/uploads/files/jejonuxokefilu.pdfIn PDF document text
- http://abwcockeysville.com/uploads/files/33301827253.pdfIn PDF document text
- http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075aeace81e6---levifotadutuzeze.pdfIn PDF document text
- http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160894f62a1111---69763679790.pdfIn PDF document text
- http://www.peritaonline.es/ckfinder/userfiles/files/bubazima.pdfIn PDF document text
- http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087391eb16ca---soposogorovavibineji.pdfIn PDF document text
- http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf0295e542---15793149373.pdfIn PDF document text
- https://ddtoyz.com/ckfinder/userfiles/files/kopudogi.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=how+to+get+teleport+in+minecraftPDF 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_off0000c750.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC750	17108 bytes
SHA-256: `153a4ac678c049ea1dc2195b883fcc6914a40f60f95f26993cd97d6a79136dcf`
`font_01_sfnt_off0000f365.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF365	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00010b7c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10B7C	10732 bytes
SHA-256: `03104992307e98cc9a6675f5604cf50bc9492100f00d3ea893fe98c05c152e09`

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