PDF malware analysis — malicious · 808624c346543de6

MALICIOUS

PDF

87.7 KB Created: 2021-07-07 01:27:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 19d9255a1b4de854542fe77bf961cc74 SHA-1: d0e07777a27d30c8bd02dc19729b393559e3055e SHA-256: 808624c346543de6815f5a2f3faf290bc0dfa52b713b73b0fb2b6e307ea7df96

204 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains embedded JavaScript and numerous external links, many hosted on compromised CMS platforms. The heuristics indicate a lure for remote support tools, suggesting the document aims to trick the user into installing or connecting to malicious software. The embedded JavaScript likely facilitates the download and execution of a secondary payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

Heuristics 8

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
Remote-support tool lure high SE_REMOTE_SUPPORT_LURE

Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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://catamma.ru/uplcv?utm_term=how+to+print+to+file+pdf PDF link annotation
- https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607d651503469---23462829916.pdfIn PDF document text
- https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/cau36eiti84p1krb6ktkj4d7gm/bovovabipujitaxe.pdfIn PDF document text
- http://zuestag.ch/userfiles/files/9565383442.pdfIn PDF document text
- http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ccb141276bf---56007932770.pdfIn PDF document text
- http://asfalon.com/__files/file/18442337488.pdfIn PDF document text
- https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/1b81359a290a361ea102c8ef0f2dc303/lesupivimifemofebib.pdfIn PDF document text
- http://beijingxinzhi.com/userfiles/file/20210626010316_1297801353.pdfIn PDF document text
- https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/a48649aea32feeeb1567bb55e8724163/59535585373.pdfIn PDF document text
- http://yaqeen-eg.com/userfiles/file/85717161705.pdfIn PDF document text
- http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089ce87504d2---xafofilafe.pdfIn PDF document text
- http://sportgalaktik.sk/userfiles/file/64371930547.pdfIn PDF document text
- https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/1dc88d3ae88eed9b87699577b111b527/fefabokafaxuvewegevul.pdfIn PDF document text
- http://espacioschillout.es/images/admin/file/gugapoda.pdfIn PDF document text
- http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc9525b71d---20884351045.pdfIn PDF document text
- http://dalaichau.com/files/wuzosujorixamufonuje.pdfIn PDF document text
- https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c67bdfdfe83---pegumopab.pdfIn PDF document text
- http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/570381e493ca49e12f845c8eb1405428/lozaromiruwu.pdfIn PDF document text
- https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607098aef05f0---ritigopirilomobaxaj.pdfIn PDF document text
- http://oilandgaswork.com/userfiles/file/pujubuguzareriluneb.pdfIn PDF document text
- https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160791b4d86a5c---6284789634.pdfIn PDF document text
- https://hzautomatisering.nl/userfiles/file/zuviporitavipitexomenoxo.pdfIn PDF document text
- http://asupuro.com/user_data/image//file/wubukosav.pdfIn PDF document text
- http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fa15f584d1---60185707018.pdfIn PDF document text
- https://yenhuy.vn/upload/files/kupokefijidizuvuregi.pdfIn PDF document text
- https://konferencii.ru/js/ckfinder/userfiles/files/6431389841.pdfIn PDF document text
- https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/321e9e7d1f4063301db21616a73ce92e/23260644484.pdfIn PDF document text
- https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/80c9f2824445c287987f3410ded1e7cf/jukomadevologuzul.pdfIn PDF document text
- https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/bv0kpglurcn2h3cm2e0hr289bm/20722678777.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_off0000f43b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF43B	17412 bytes
SHA-256: `6f9310b87751c0f0720eda7d76cd0228ec890723889565b9389638089e974cca`
`font_01_sfnt_off00012274.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12274	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00013a8b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13A8B	10240 bytes
SHA-256: `e92da77559f3516bcc1d9455ccf6e306ff8ef3687aa5aa6626769c7760172b06`

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