PDF malware analysis — malicious · 8c745c89592c9883

MALICIOUS

PDF

79.0 KB Created: 2021-09-16 02:50:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 24e51489bddc4200be9d045109850e54 SHA-1: 7e00348bd143ba3e222eea014bfb9da799eaeb8b SHA-256: 8c745c89592c9883f73bd6fba7b0608e3be99867d9ad3c966c6cad8532276eb7

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure point towards an attempt to trick users into visiting these sites, likely for credential harvesting or further malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.8140

Heuristics 5

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
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://coretry.ru/uplcv?utm_term=document+recovery+app+for+android PDF link annotation
- https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/k31ikmmffuluhkcve0fhpel9a5/gupopagunububadumutomibi.pdfIn PDF document text
- https://masihpt1.com/contents/files/6645147716.pdfIn PDF document text
- https://thehouseproduction.net/file/26494253004.pdfIn PDF document text
- https://www.hs-hofgastein.salzburg.at/ckfinder/userfiles/files/wikexamodijojipex.pdfIn PDF document text
- https://snapstudios.ca/userfiles/file/jubarevodenudoxonap.pdfIn PDF document text
- https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/ln5oomu8iaemr59fq000tcdomf/44217674569.pdfIn PDF document text
- http://pass38.com/images/contentimages/files/43282314938.pdfIn PDF document text
- http://markfarolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xebozebalamigebu.pdfIn PDF document text
- http://djapm.com/userfiles/file/55616016504.pdfIn PDF document text
- https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/3af081c1abad84a663ba0d1268a3d01b/jojoxovebizok.pdfIn PDF document text
- http://ellenia3.eu/userfiles/files/lexigipokagefotujovi.pdfIn PDF document text
- http://pobierzplik.pl/uploads/files/dawudugabovikobekuse.pdfIn PDF document text
- http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613df86d7b261---nopinojovowon.pdfIn PDF document text
- https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/ptp303r8gjnb6aibodnb9cg0ma/najuditipopijetifosex.pdfIn PDF document text
- http://togclick.com/media/userFckfiles/file/11333493255.pdfIn PDF document text
- http://thegioichuyendong.info/app/webroot/upload/files/44299741550.pdfIn PDF document text
- https://vinacomvietnam.vn/uploads/news_file/mokusiputoxube.pdfIn PDF document text
- http://www.otevrenysklep.cz/ckfinder/userfiles/files/rivekapuwamexakurugagus.pdfIn PDF document text
- http://bajajsports.com/userfiles/file/4154963618.pdfIn PDF document text
- http://app0.linkeo.it/ckfinder/userfiles/files/mobixogolenidututubizaz.pdfIn PDF document text
- http://sakuragiramenandsushi.com/uploads/files/61557179258.pdfIn PDF document text
- http://elijasprojekts.lv/files/file/pavemu.pdfIn 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_off0000e2a6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE2A6	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000fab8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFAB8	17084 bytes
SHA-256: `c9d29add8f9f99b0c9fa12e7ce2fddd56e837a724736725decedbf407c9ed229`
`font_02_sfnt_off000126cf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x126CF	10848 bytes
SHA-256: `10bc4b89bc91ce34698cd7894bd393775970e1b2a637445a592017a658f3e5d3`

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