PDF malware analysis — malicious · 1f43eaac22dcad06

MALICIOUS

PDF

84.8 KB Created: 2021-06-27 11:48:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20

MD5: bc12c6cb2f80562659676089829e1f3b SHA-1: c535a8f2dae2b14af24047316f292a85f6a7faab SHA-256: 1f43eaac22dcad069f1b0dd8c9d60d7f42bf6db53f112e3ff0cf7aed891cfe6c

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document functions as a link farm, containing numerous URLs pointing to compromised WordPress uploads and other disposable hosting. These links likely lead to phishing pages or further malware downloads, aligning with a spearphishing attachment attack vector.

Machine Learning

Nyx PDF Classifier malicious score 0.9964

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 https://garglob.ru/uplcv?utm_term=feeling+tingly+all+over+and+light+headed PDF link annotation
- http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c7bc745f74c---49057555775.pdfIn PDF document text
- https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8078088dc24597a55bf9435a32e7f93a/61888496590.pdfIn PDF document text
- https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/a08081c9c2ee1d68cfc53af2a03539ed/pomirarevawab.pdfIn PDF document text
- http://lubrifianti-auto.ro/files/file/39027749672.pdfIn PDF document text
- http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160813fd065d2e---duruvopufigexafigeju.pdfIn PDF document text
- https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/864a7bd269a6e3c49682aa8c48c9b754/1928948131.pdfIn PDF document text
- https://muacash.com/webroot/img/files/79940546982.pdfIn PDF document text
- http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160759da810d90---pobubigugumasile.pdfIn PDF document text
- https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/7abb42eee25e98c9849ad7e793387281/60258463167.pdfIn PDF document text
- https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/lbjtlrr4cdrbq436m9s3oe3ois/selidikisapaje.pdfIn PDF document text
- http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca34858b62---37777597838.pdfIn PDF document text
- http://angelcabrera.com/FCKfiles/file/lunizivedubowiw.pdfIn PDF document text
- http://poorclarescork.ie/images/51680862165.pdfIn PDF document text
- http://ural-resyrs.ru/data/file/xakezafi.pdfIn PDF document text
- https://agatanorek.com/files/file/30954609015.pdfIn PDF document text
- http://enotecagaribaldi.it/userfiles/files/77328475040.pdfIn PDF document text
- https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/6324fa20b95c16194e3be3f7ba7d600d/5317854739.pdfIn PDF document text
- https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9a6d53d8d---9161046255.pdfIn PDF document text
- http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608205629a279---12283688021.pdfIn PDF document text
- https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/e31cb10b96ef0320e6b2dc34a7558626/wajinofimizesunitezubuva.pdfIn PDF document text
- https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/3mgp56uo76obrclstnnu2krkll/satukewesaxa.pdfIn PDF document text
- https://codecs.ro/images/file/bedixekeso.pdfIn PDF document text
- 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_off0000e8ea.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE8EA	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off000100fc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x100FC	17300 bytes
SHA-256: `3cc54d5e570a9ebddf5322a3598ee42c53ab739caf5845aed963ba731ba04fcd`
`font_02_sfnt_off00012e32.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12E32	10516 bytes
SHA-256: `b8206975e0d8a21e47b25a8265f45bfaa71e387a7659823119ef7eb345c6ea99`

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