PDF malware analysis — malicious · d27df46604555e81

MALICIOUS

PDF

85.2 KB Created: 2021-06-28 05:35:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 08e23ea8374adab9e99687a8880887cd SHA-1: 06e616090b7017c7ca4ff783f9d462fc29bc34be SHA-256: d27df46604555e81d947232e2fd41d38942bc935fe5512408209d39ad1104635

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file is identified as a malicious PDF by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites, likely intended to lure users to phishing or malware download pages. The presence of external URIs and link farm heuristics strongly suggests a malicious intent to redirect users to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://coretry.ru/uplcv?utm_term=call+of+duty+cold+war+cheating PDF link annotation
- https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607867dfccab1---69813356498.pdfIn PDF document text
- https://sbufficio.it/file/fepanavobalir.pdfIn PDF document text
- https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/kuac5a6atqj8mm4147qd918o22/vilulidizesenu.pdfIn PDF document text
- https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/8f1739a633b59a0b5a5dee27c3e87c7b/60975792318.pdfIn PDF document text
- https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba0f89046c0---24915107100.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072e9153faf7---barodinutuxanuwajoxogivu.pdfIn PDF document text
- http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c885747a2be---44086736309.pdfIn PDF document text
- https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/0e1pqqkdomtvjrdsjp2ienns14/52879946382.pdfIn PDF document text
- http://3e-machinery.ru/app/webroot/filesfiles/kawawetoras.pdfIn PDF document text
- http://curry-box-deluxe.de/userfiles/file/26520129384.pdfIn PDF document text
- https://kuzeyilac.com/resimler/files/71043055973.pdfIn PDF document text
- http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160871bcf4ad37---74088912338.pdfIn PDF document text
- http://appartenvue.net/appart/upload/images/mujunififogadiwita.pdfIn PDF document text
- http://www.vegagastro.pl/upload/file/nowalotajagujavafoloma.pdfIn PDF document text
- http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607920ac09af8---55726593973.pdfIn PDF document text
- http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1608dd455d31b5---vikarivubidufune.pdfIn PDF document text
- http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a1cb2ff0486---60610086465.pdfIn PDF document text
- https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/f740920c679224579d68e31d4547dcb0/woxezowixenejedejowoja.pdfIn PDF document text
- https://chpcentre.com/files/file/71529339973.pdfIn PDF document text
- https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/d56b838243cd73098760ace31ecb3be6/69571610438.pdfIn PDF document text
- https://manenshop.com/upload/files/47508350102.pdfIn PDF document text
- http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d87a9bf6be---49437628078.pdfIn PDF document text
- http://mulherinscampground.com/clients/879992/File/72684728649.pdfIn PDF document text
- http://xahscw.com/userfiles/file/xogurufilum.pdfIn PDF document text
- https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160876c4e9ae3a---56404206312.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_off0000e8b6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE8B6	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off000100c8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x100C8	17332 bytes
SHA-256: `2a8ddcfda0d11764c18e5d8206556ac376d13cd8e6b496f097e8787a4b4da119`
`font_02_sfnt_off00012e5c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12E5C	10916 bytes
SHA-256: `494a38af3edfcd8f91d637a64ea294ad2feb905d3782d9a233ccb248a6724cb5`

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