PDF malware analysis — malicious · 23d6a68410441f63

MALICIOUS

PDF

87.1 KB Created: 2021-07-01 10:30:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 1befa57a8bb9589c9a1572dfc0cb1476 SHA-1: dee544abb56810c2d6c7c55f511339e4f99c5328 SHA-256: 23d6a68410441f632bbbf298e511d1c20a256163a1822d42184626acdacb55a9

216 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document is classified as malicious by ML and ClamAV, and exhibits characteristics of a phishing lure. It contains numerous links to external sites, many of which appear to be compromised or disposable hosting, suggesting an attempt to distribute malicious content or phish for credentials. The critical heuristic 'SE_SECRET_RECOVERY_LURE' indicates the document's content is designed to trick users into revealing sensitive recovery information, such as private keys or backup codes.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

Heuristics 7

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

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE

Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
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 http://gtshotel.it/images/file/80697728625.pdf In PDF document text
- https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/945n2v0biigbunepidd6j5115q/11741101454.pdfIn PDF document text
- https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/86aff1f308a533a527a59ca86fa3059e/26791100126.pdfIn PDF document text
- http://aylincinarli.com/fckfiles/file/xaxal.pdfIn PDF document text
- https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/3ea97a3391e3a918b9c6f8eb6325f632/903867416.pdfIn PDF document text
- https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b085809c323---82698537157.pdfIn PDF document text
- http://purpledoorchurch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608235d743bdc---kududiwuxe.pdfIn PDF document text
- http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607278283d6fe---taguwugujefulokamatanij.pdfIn PDF document text
- http://rjbmachinery.com/d/files/77799826273.pdfIn PDF document text
- http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084da825b63d---dejukifumegugibu.pdfIn PDF document text
- https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6efd9088f89502f8093661a2cebcdfa2/rileker.pdfIn PDF document text
- https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/6082bcecc5c1bb1a4a7e75faefea5f05/sivuzizisaxor.pdfIn PDF document text
- http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a8594647545---najezalokuluzizakesopaxo.pdfIn PDF document text
- http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160806e7c14558---lekeg.pdfIn PDF document text
- https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c611f95dbb7---lipifanaditojorasijofagit.pdfIn PDF document text
- https://churchofgodinjamaica.org/app/webroot/files/xabazatepiseworibimog.pdfIn PDF document text
- https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/2db2405c1cdaf27cf59260e09d6ebf22/49461134641.pdfIn PDF document text
- http://goteneplast.se/files/images/file/66584591933.pdfIn PDF document text
- http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/16072f0d4779d9---fazenisu.pdfIn PDF document text
- https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/p731qd2tlqtg9j9plg6ifciifs/wazopawid.pdfIn PDF document text
- https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/d76544933938b61691dff681f32627bb/novim.pdfIn PDF document text
- http://aceonlinementors.com/userfiles/file/41216767899.pdfIn PDF document text
- https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098749910e66---95954051821.pdfIn PDF document text
- https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16081fc1d0a776---vidoxew.pdfIn PDF document text
- http://sowitech.vn/upload/files/mupukelolezesiko.pdfIn PDF document text
- https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608568f164142---lukimivirulexusepanujive.pdfIn PDF document text
- https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/a2ea53cca0d22cabd467ede2fdcb37c3/duluzugemolokemuwar.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=rest+stateless+or+statefulPDF link annotation
- 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_off0000f1b7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF1B7	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off000109ce.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x109CE	10156 bytes
SHA-256: `6d3913ca189b6db3a7eb1712665802476280b2cd4fa6f955a9fa15a31edbe73c`
`font_02_sfnt_off000120bf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x120BF	17612 bytes
SHA-256: `958a351ab0cbc4ec019c8153117e1fea5b01e894093478dc2dfd67535c9ecf21`

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