PDF malware analysis — malicious · 73c0e78b36b35059

MALICIOUS

PDF

89.9 KB Created: 2021-09-06 20:50:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05

MD5: be9294a18cab791dd41806b5c94469d0 SHA-1: 1e130cf086a780ba7b10d2af8f35690680133428 SHA-256: 73c0e78b36b350599a3bc41fb58dba22c43491db14503e5a4141fbdd315f2ce7

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics indicate the document functions as a link farm, with many URLs pointing to potentially compromised CMS uploads or disposable hosting. The presence of numerous unknown URLs suggests an attempt to direct users to malicious content or phishing sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9970

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://yaqeen-eg.com/userfiles/file/fasewovi.pdf In PDF document text
- http://smcertificationservices.com/userfiles/files/5535237385.pdfIn PDF document text
- http://guides2alpes.org/uploads/file/10913775344.pdfIn PDF document text
- http://alibabashipping.com/userfiles/file/tekob.pdfIn PDF document text
- http://getwealthythisyear.com/ckfinder/userfiles/files/77965284684.pdfIn PDF document text
- http://broadviewlibrary.org/uploaded_bvlib/file/xavobukujidapepawoji.pdfIn PDF document text
- https://accesoriosalmayor.com/images/userfiles/file/42589090445.pdfIn PDF document text
- https://baongochoa.com/upload/file/29942157144.pdfIn PDF document text
- https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/738a2755f451eb70be3422a6184ff4e8/duvimixiviwedesamarupemen.pdfIn PDF document text
- http://mytmbc.org/fckimage/file/10858988425.pdfIn PDF document text
- https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/acded00ea83dad4522b64c63cd2106dd/wamawefuvuvok.pdfIn PDF document text
- http://www.koeru.eu/failid/file/bopolodorumuwinazesupix.pdfIn PDF document text
- https://nada70.org/userfiles/file/6147307156.pdfIn PDF document text
- https://khonggiansachhanoi.vn/uploads/files/dewaburuxefefuvikiga.pdfIn PDF document text
- http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/1bd5c644899ed47dbb8f52f90c2653fe/19663481095.pdfIn PDF document text
- https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/8f900290c82904a22db7ef6f5cf296e1/luluzewumekami.pdfIn PDF document text
- http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6724def180---66566253899.pdfIn PDF document text
- https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080145aabb77---dawuvuzosot.pdfIn PDF document text
- http://agrocare.hu/ckfinder/userfiles/files/33782285899.pdfIn PDF document text
- http://shophouse.info/images/files/vuluwefojizano.pdfIn PDF document text
- http://smn68.com/clients/75339/File/97328129004.pdfIn PDF document text
- http://servmed.net/userfiles/file/rivitug.pdfIn PDF document text
- http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/0gkbkq4vbvpf9ugqpdjui113a4/48538669739.pdfIn PDF document text
- http://oxigensupplies.com/shipinc/userfiles/files/xotuvujosumod.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=manual+for+samsung+galaxy+tab+aPDF 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_off0000f9c9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF9C9	10780 bytes
SHA-256: `cd7883d75ee3f8e9979dd1ae1a39bf99f7c72fb79d11485f56f017ed53485c66`
`font_01_sfnt_off000112ad.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x112AD	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00012abf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12ABF	18228 bytes
SHA-256: `83fe828ec78b16c87f4ac7f829a7a7498afc21e4a954f8ec2e93c30f4a96be4d`

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