PDF malware analysis — malicious · 975b4ff6291809a5

MALICIOUS

PDF

79.4 KB Created: 2021-08-17 03:53:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 86ae9073f46e9acd46f5c06aa749e651 SHA-1: ae097791f56398f79269a6e23b4bf32e5053e355 SHA-256: 975b4ff6291809a5ea65df1c83e1c36b7f25cef0dece519fc55ee7fd5b307b04

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 ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress sites and other domains, suggesting it functions as a link farm or redirection mechanism. The presence of these links indicates an attempt to direct users to potentially malicious content, likely for phishing or malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9934

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://cructi.ru/uplcv?utm_term=placa+mae+dell+mih61+mb+10097-1+manual PDF link annotation
- https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ea73b763a---95744729274.pdfIn PDF document text
- http://hongdacable.com/d/files/29662110057.pdfIn PDF document text
- http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b86a8c88b94---nagoxabexepegisoporoxo.pdfIn PDF document text
- https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/ff5c4eaf0ffc498bea06d6c4be39f077/kemafonofalubuvazuteret.pdfIn PDF document text
- http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608e3070943e8---wazepubizigakobenuj.pdfIn PDF document text
- http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/fc63fe0473933931e355674aa55b0a02/xelojutufavurijireb.pdfIn PDF document text
- https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/dc39911d53676efda8cdaf1737a7afa6/nusojusomesa.pdfIn PDF document text
- https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/29e89ca8a900166713547204f26d1a27/29100874050.pdfIn PDF document text
- http://kiddeefire.com/media/userfiles/files/ralugofok.pdfIn PDF document text
- https://medtek.vn/storage/file/51807325726.pdfIn PDF document text
- https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609452bf2dcef---72343802631.pdfIn PDF document text
- https://interior-mark.com/ckfinder/userfiles/files/50965848668.pdfIn PDF document text
- http://xn--2vxr09c6mc.tw/CKEdit/upload/files/94946291194.pdfIn PDF document text
- http://www.sport-konyv.hu/userfiles/file/44857990132.pdfIn PDF document text
- http://gfhs1978reunion.com/clients/56625/File/24774715746.pdfIn PDF document text
- https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/ac5b66b793afe682b651729bd225d886/xorewoguwokisixo.pdfIn PDF document text
- https://stalbeckers.nl/userfiles/image/file/jejaxokajofisukej.pdfIn PDF document text
- http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160af93cbd346c---vumenele.pdfIn PDF document text
- http://www.taylormadetc.com/siteadmin/ckfinder/userfiles/files/gubuvanibaxekejiwi.pdfIn PDF document text
- https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b99ba05bfe3---12659469377.pdfIn PDF document text
- http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607562f2e67e8---41678771711.pdfIn PDF document text
- http://universalthailand.com/images/uploads/ckfinder/files/64634777635.pdfIn PDF document text
- http://xn--80aafbkbafwdti1ahihccrg.xn--p1ai/pict/file/rivomolubutumebo.pdfIn PDF document text
- http://logisticsnetworks.net/ckfinder/userfiles/files/gafabaluwujulinomi.pdfIn PDF document text
- https://creteservices.com/FCKeditor/userimages/file/lalufanetef.pdfIn PDF document text
- https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610aab940e089---91591225723.pdfIn PDF document text
- http://beastyenergy.com/userfiles/file/5496804694.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_off0000d793.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD793	10984 bytes
SHA-256: `811ed3725c2e42ca7c05e57f0530e5202cdeb518ec48150278b6c6bfb5f2addf`
`font_01_sfnt_off0000f0d7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF0D7	15696 bytes
SHA-256: `6bc641c48094d9f98ff07fb4e090e007fa06d871d6c81c518af0fb62832ac49b`
`font_02_sfnt_off0001170e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1170E	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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