PDF malware analysis — malicious · dde35724d683d35d

MALICIOUS

PDF

81.2 KB Created: 2021-07-18 11:16:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 0ea47910b0fab694072a050f05c580b9 SHA-1: 074ed5a1e46642d0645cb0ecd8ff019002031bde SHA-256: dde35724d683d35d98fc6ba30074bea9cfb2473ea7911698eb5967965c31f721

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by a machine learning classifier and ClamAV. It contains numerous links to external websites, many of which appear to be hosted on compromised WordPress installations. The presence of a link farm on disposable hosting suggests an attempt to obscure the true destination or purpose, likely to distribute malware or conduct phishing attacks. No scripts were extracted, but the overall structure and heuristic firings indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9940

Heuristics 6

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
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://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160885a20ecd6b---mizetobut.pdf In PDF document text
- https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/f525002029cb86d60065081ba9c0dc73/78089271865.pdfIn PDF document text
- http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073a6416ed8c---79754804457.pdfIn PDF document text
- http://fcv-bo.org/data/fcv-bo/userfiles/file/58989105657.pdfIn PDF document text
- https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/13bf1ec92d47c6ef1b9770aee79f66bf/86082382459.pdfIn PDF document text
- http://hchs1972.com/clients/2/2c/2cb73362227bcfbd3ed6ae01b5b3dc46/File/kegejofebazupewu.pdfIn PDF document text
- https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f23a232b44---36665573615.pdfIn PDF document text
- http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160cf5a5babe38---2186957825.pdfIn PDF document text
- https://nonbodepsg.com/uploads/files/17769612048.pdfIn PDF document text
- http://prestopc.it/upload/file/41079807707.pdfIn PDF document text
- https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/e264973fd90b33a3e874316476e88c51/24251202757.pdfIn PDF document text
- http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c65e2358384---ditugalanolawebubuvi.pdfIn PDF document text
- https://bibliothequedesarts.ch/ckfinder/userfiles/files/paxapajekaf.pdfIn PDF document text
- https://livresdarts.com/ckfinder/userfiles/files/11654386265.pdfIn PDF document text
- http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/ff5280491b1e9d98630f6cd305967260/64487845492.pdfIn PDF document text
- http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec40ac4b2b2---65849263346.pdfIn PDF document text
- https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/kv0kptk8t8pnrub6tej5e1n533/vobeb.pdfIn PDF document text
- http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16093f4984a266---29132752190.pdfIn PDF document text
- http://ippon.lv/uploads/File/82662026307.pdfIn PDF document text
- http://murielbellhomes.com/userfiles/files/3433601566.pdfIn PDF document text
- http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160814a068e327---xixukokokujosesejuwukeva.pdfIn PDF document text
- http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f15798be570---36878934634.pdfIn PDF document text
- https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/1uj6ua0p9kqn3ddbgsnqh8pik4/gosoxe.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=john+witherspoon+soul+planePDF 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000c383.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC383	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000db9a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDB9A	10528 bytes
SHA-256: `3c948e5e9caff71c473b01b77d2dafdbbe2042d6e139bd80a22035e9444e014e`
`font_02_sfnt_off0000f39d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF39D	17548 bytes
SHA-256: `a3f7e541cd28b3d992c998e75915d1a794d13c814d18d27fef82db714af8cee0`
`font_03_sfnt_off000120a3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x120A3	16088 bytes
SHA-256: `0e3d63f173342003c62a86c726d4d5a85e7f52d44cf06618766a4fa08a0866bf`

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