PDF malware analysis — malicious · cf4315bf6248314e

MALICIOUS

PDF

95.2 KB Created: 2021-07-08 04:45:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23

MD5: 70f4e8eb0ec4bfec3f83ea66de4351cb SHA-1: eb8a3713cd27da8fccf5bed13d34f43dd69fbb56 SHA-256: cf4315bf6248314e914b97e12d6806337b9591b9f6a4712db692c5c727e46265

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many of which are 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 nature of the heuristic firings strongly indicate a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

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 http://pusancard.com/userData/board/file/66135341755.pdf In PDF document text
- https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/d578baabc38a68ee1182f3071a4ba75b/xipujugifijotakes.pdfIn PDF document text
- http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b12dc1e152f---piruwubiripodilonurejo.pdfIn PDF document text
- https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/9fb3ff2fc22e0209dfaf75c1302ab854/xusuxemotuzosolipuza.pdfIn PDF document text
- https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/cd42caf5dd572b73b27d512e198121ef/pavaro.pdfIn PDF document text
- http://shinies.ru/img/lib/file/57211425487.pdfIn PDF document text
- https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/c97b4b4a7f5dc03c32f45030a2bb3db5/22047290502.pdfIn PDF document text
- https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/1b0b59de9beba8bf236d5016d0453092/56122345825.pdfIn PDF document text
- https://duext.com/wp-content/plugins/super-forms/uploads/php/files/d6fb4934b6906237158bb8733a602197/gefofufiparilesom.pdfIn PDF document text
- http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa70d82d50---kozapire.pdfIn PDF document text
- https://www.surajinformatics.com/wp-content/plugins/super-forms/uploads/php/files/9b9b6e2705e6ccdb0ac4e38c306e285a/mogabifizogifopelesi.pdfIn PDF document text
- http://claphamtaxi.com/survey/userfiles/files/25336026028.pdfIn PDF document text
- http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c89a622252---1480445141.pdfIn PDF document text
- http://luvnchrlysenglishtoys.com/clients/861429/File/kadulapu.pdfIn PDF document text
- http://beamstraffic.ae/amb/userfiles/file/wagiparemiwigapoza.pdfIn PDF document text
- http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099a57f52d54---kadapas.pdfIn PDF document text
- http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/6sp48eoo110sk73bkdpb3l1rc7/1252967744.pdfIn PDF document text
- http://www.derbysignandgraphics.com/uploads/file/butodibuvuperexotu.pdfIn PDF document text
- https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/65da4666a0157f6a804780bca15c6dcc/13999191762.pdfIn PDF document text
- https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/5eabcdb33f8e35b417d2beecab4bfbc0/17983012725.pdfIn PDF document text
- https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9d7673071---dejevapugomamigilinenosa.pdfIn PDF document text
- http://miroslaws.com/ckfinder/userfiles/files/2551869369.pdfIn PDF document text
- http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b16269522b---13014259028.pdfIn PDF document text
- http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/5d6b22f46929865470679d06b27a2627/29725970786.pdfIn PDF document text
- https://shibbirs.com/media/files/87110062456.pdfIn PDF document text
- https://penal-garazh.ru/files/xugenokupepejedax.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=why+is+my+alexa+not+working+on+my+firestickPDF 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_off00010e62.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10E62	17128 bytes
SHA-256: `b1feeca2f1f56f44a4121280ffa508c0b2d779916c011338adc86ae0a6429c62`
`font_01_sfnt_off00013b13.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13B13	11168 bytes
SHA-256: `973d66172239bdb7a21640fe5b23d7fc2afdfcee0a7c7d94ad16bcf91a9f375f`
`font_02_sfnt_off0001551c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1551C	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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