PDF malware analysis — malicious · 552f40224f74d15c

MALICIOUS

PDF

78.3 KB Created: 2021-09-08 01:49:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: c14f7a1c2629738578752929e7b77d1e SHA-1: 117c72c3a77af3f1c34980f8f412645e774c74b4 SHA-256: 552f40224f74d15c29550409835932daa3c8fdd5a4c63cdef563aaf8323de3e3

196 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised websites, likely intended to host malicious files. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass gateway scanning. No scripts were extracted, but the presence of embedded URLs and the link farm structure suggests a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9917

Heuristics 7

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE

Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
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
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
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://aquarium-kochi.com/app/webroot/ckfinder/userfiles/files/19997531888.pdf In PDF document text
- http://abwmarlboropike.com/uploads/files/24081055934.pdfIn PDF document text
- http://elcampoeco.org/FCKeditor/file/folodokegexigibubo.pdfIn PDF document text
- http://laarakkers.com/ckfinder/userfiles/files/46860550065.pdfIn PDF document text
- https://aydin-elektrik.com/resimler/files/rikorozo.pdfIn PDF document text
- http://diamantina-joaillerie.com/ckfinder/userfiles/files/65303852882.pdfIn PDF document text
- http://architettipassarinmarzotto.com/userfiles/files/40083855875.pdfIn PDF document text
- http://yousefmaktabi.com/ckfinder/userfiles/files/80281132038.pdfIn PDF document text
- https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/59c3c2714935c0ba52a1e9963685f9ef/kedexadapejilusogopebedut.pdfIn PDF document text
- https://lamthong-marchph.com/piceditor/file/33212583381.pdfIn PDF document text
- http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/161198b72f370f---76702682954.pdfIn PDF document text
- http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1038f2150---77053810352.pdfIn PDF document text
- https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/1af4fdc9dafe53fcdc6d24647e6e78b2/9764659665.pdfIn PDF document text
- http://knshzj.com/CKEdit/upload/files/44939557466.pdfIn PDF document text
- http://salondebellezaanamariaromero.es//ckfinder/userfiles/files/26584384125.pdfIn PDF document text
- https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087758293e2f---77407536215.pdfIn PDF document text
- http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071df0492a18---257034926.pdfIn PDF document text
- http://elementsgogreen.com/userfiles/file/2470082894.pdfIn PDF document text
- https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a08dbde77be---guwepobanitidafojin.pdfIn PDF document text
- http://nationalcoopadvisors.com/userfiles/files/jotoselafarir.pdfIn PDF document text
- http://herculesestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/72436191711.pdfIn PDF document text
- https://www.explosivo.gr/wp-content/plugins/super-forms/uploads/php/files/5a57de3b244b8e274225d5f8622010e7/16864571702.pdfIn PDF document text
- http://homestationrealty.com/userfiles/files/dezegutepolisikebuloni.pdfIn PDF document text
- http://elcwma.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/77063054875.pdfIn PDF document text
- http://sh-ruiyangcpa.com/userfiles/file/2021-7///2021727222504375.pdfIn PDF document text
- https://floraplant.gr/FCKeditor/userimages/file/3648763535.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=transformar+pdf+em+word+online+ocrPDF link annotation
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- 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_off0000cb19.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCB19	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000e32b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE32B	18296 bytes
SHA-256: `4ff046ba812acd5e0b29058fd691ac4c088b8f5ebbe022c217d4ae3f16717b43`
`font_02_sfnt_off00011272.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11272	10732 bytes
SHA-256: `10eb488f3773fe385c5084506d069820963a7f413e7587b74fbc929dfd6c0407`

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