PDF malware analysis — malicious · b309df9ed62e3565

MALICIOUS

PDF

91.9 KB Created: 2021-07-03 11:16:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: a9574b05e210bb0c76c085169ecc77d6 SHA-1: 23173ab205ca8547fc21352be18c269d5071efa0 SHA-256: b309df9ed62e3565501c9a5adafdb37cc6c83e5bad5195b2de1ebb02e5c4b5ae

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs pointing to compromised websites and disposable hosting, indicating it functions as a link farm. The primary purpose appears to be directing users to malicious sites, likely for phishing or malware distribution, which aligns with the Spearphishing Attachment technique.

Machine Learning

Nyx PDF Classifier malicious score 0.9822

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://crysiq.ru/uplcv?utm_term=scripture+about+controlling+your+tongue PDF link annotation
- https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/8a84dbf79150b53a3e4283aa841da630/56275784834.pdfIn PDF document text
- https://biblioteka-koneck.pl/ckfinder/userfiles/files/34595733088.pdfIn PDF document text
- http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/4e3htdarpu5avd3irsg3v486tp/pitoxelorexemij.pdfIn PDF document text
- https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/3cbf6861ba19e3cdaed6343ec7f6b92b/bulawefetusidosivadezowub.pdfIn PDF document text
- https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607788db38087---9254675918.pdfIn PDF document text
- https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e737e75f05c713421b3c874d20e3c833/34240213860.pdfIn PDF document text
- http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d70b5e092e---80486678565.pdfIn PDF document text
- https://nutricount.cz/UserFiles/File/nofurutoreziwotapa.pdfIn PDF document text
- https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0acd4891f---jukokorude.pdfIn PDF document text
- https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073b505c2560---vuwefuseg.pdfIn PDF document text
- https://fotokeramika.bg/userfiles/file/posoz.pdfIn PDF document text
- http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1606d612647a76---pobifenugidosigarupol.pdfIn PDF document text
- http://paroissedementon.fr/upload/files/66306411749.pdfIn PDF document text
- http://sylvianapoles.com/clients/e/e6/e63d90d46a840f0b3195f531cec11f6e/File/zajivoxirenifesiveta.pdfIn PDF document text
- https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/d34a96420b50fe36929629cd6ae541f2/64774555506.pdfIn PDF document text
- http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160b7f1c542c01---57663457043.pdfIn PDF document text
- https://sunrise-photon.com/upfiles/editor/files/26890774715.pdfIn PDF document text
- http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160d09224dde91---rejafidonipilugajixamawof.pdfIn PDF document text
- https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/5k3km2eficg3ulhjiip7dmclpp/zutave.pdfIn PDF document text
- http://le-lemniscus-incandescent.fr/ckeditor/upload/files/3939517253.pdfIn PDF document text
- https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/342f99dcba9f8f57cb21f4bdd50e7bea/58794919544.pdfIn PDF document text
- http://circuitvietnamcambodge.com/hinhanh/file/tutixokebole.pdfIn PDF document text
- https://najlepsze-w-polsce.pl/uploads/tutomelelax.pdfIn PDF document text
- http://kovacsoltvaskerites.hu/images/file/dusuxogamefulalagi.pdfIn PDF document text
- https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/bhu878snipl5vukdqoup1r1kn5/2525705702.pdfIn PDF document text
- https://hogies.com/includes/template/uploads/file/sokodumobokatasar.pdfIn PDF document text
- https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/cb08e10943c59346b7b020bed8174a2c/41135467551.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_off000104e3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x104E3	10808 bytes
SHA-256: `cf2b6932ae518cac2d65405108291b6dd78c15c739b5cd21857ee0abeb8cf45c`
`font_01_sfnt_off00011dbd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11DBD	16944 bytes
SHA-256: `83d3e5d8abb25395d5c33fc67c26464d8eccb5af719f148505d1d23395eabab9`
`font_02_sfnt_off000149c9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x149C9	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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