PDF malware analysis — malicious · ed72f7e2a9bc40a9

MALICIOUS

PDF

238.6 KB Created: 2021-08-20 00:06:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: b60744504383849133076b71b0b4ba4b SHA-1: 905bf2e9f5a8b7d8aa66439bf91436217f4c2c5e SHA-256: ed72f7e2a9bc40a9296605d664d73804d29bfebd41f428ead299cb865698e73e

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple compromised WordPress sites, indicating an attempt to redirect users to malicious content. The presence of numerous embedded URLs, many hosted on compromised CMS uploads, strongly suggests a phishing or malware distribution campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9568

Heuristics 5

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.
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://pickup-ws.com/userfiles/files/norapoxapaxux.pdf In PDF document text
- http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/3c65b8f46fcd7b60f50deebdf93ea85b/mobusoravar.pdfIn PDF document text
- http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/nie0bci66tdeoul37bfibd3dv3/kugaloluzame.pdfIn PDF document text
- http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d712f382eb---webovej.pdfIn PDF document text
- https://dcoderesearch.com/uploads/bagujomezijuvawusolawir.pdfIn PDF document text
- https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607be0d5a8519---gusupid.pdfIn PDF document text
- http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b574eca158f---15713054338.pdfIn PDF document text
- https://carcarnet.com/home/sandbox/domains/hkdance.tritek.hk/public_html/ckfinder/userfiles/files/pukuzuzo.pdfIn PDF document text
- https://ocw.tw/uploads/files/ripata.pdfIn PDF document text
- http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff21f4cf15---vojonusafanululotezipu.pdfIn PDF document text
- https://barrierball.cl/ckfinder/userfiles/files/moketira.pdfIn PDF document text
- http://lawyermo.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/90521804142.pdfIn PDF document text
- https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160731eec7078e---36839880365.pdfIn PDF document text
- http://baliretreatcenter.com/olabali_ci/media/images/newsfiles/timekonurasipunekipi.pdfIn PDF document text
- https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/400ecc4726bf3938e647e16a37b1ac06/7190999110.pdfIn PDF document text
- https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/c7f4c7706b758db5b3930844e890cbe2/53172219072.pdfIn PDF document text
- http://villa-carlshorst.de/sites/default/files/file/gedarisinujimirulurodoven.pdfIn PDF document text
- https://www.demetagras.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607677d321026---nebawuxaj.pdfIn PDF document text
- https://mps-india.com/userfiles/files/zorekavu.pdfIn PDF document text
- https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/solfdfs97acjmdg66nf0d9spm0/zizovukiloke.pdfIn PDF document text
- https://zemtechnika.lt/public/site/0files/67880602476.pdfIn PDF document text
- https://101doctor.com/uploads/ckfiles/files/60b6b666888b9.pdfIn PDF document text
- http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607909b28570b---dorasolimewapuruvu.pdfIn PDF document text
- http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16089fe941ed49---dozisugafagupowebepov.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=infinita+secundaria+historia+2+respuestas+pdfPDF 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00032f52.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x32F52	10844 bytes
SHA-256: `ec22227da2836c258fb8bd62075aab34dae24e8590755a9394bf263e3c4ac6fd`
`font_01_sfnt_off00034852.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x34852	20384 bytes
SHA-256: `739f9087e6861766ab4cfa0c4a5249eabef8092c6ca89ee09766628a65d28adb`
`font_02_sfnt_off00037c86.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x37C86	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_03_sfnt_off00039497.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x39497	16308 bytes
SHA-256: `5a8ffe68ca004ef2f796a710cee8e1aa086d808c2bbd561661d4884fc7041806`

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