PDF malware analysis — malicious · ae30f917257b52ce

MALICIOUS

PDF

85.4 KB Created: 2021-07-01 23:20:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 80aab63ad87613f222d5e5ead376c5a3 SHA-1: 3dca265060108f046c67e72db20d891c6d834710 SHA-256: ae30f917257b52cead078f3fe617e2df5480ff604c7e7517e539c0487dff1415

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it functions as a link farm. Multiple URLs extracted from the document point to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious or phishing sites. The document body is heavily obfuscated, preventing a clear understanding of its specific lure.

Machine Learning

Nyx PDF Classifier malicious score 0.9860

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://celiapopememorial.com/clients/4/45/45605e685ba8a3b32f56966823665796/File/vesorutudukuto.pdf In PDF document text
- http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae509a1486a---kofolekukidatulexutusafax.pdfIn PDF document text
- http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087d0d2f31ee---8816662257.pdfIn PDF document text
- https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acd97b0f2bb---dukapinedadifiwatarikozik.pdfIn PDF document text
- https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/a0db680e18c403fc211bb95510a9bbb6/11287590809.pdfIn PDF document text
- https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160754fc700722---18611357134.pdfIn PDF document text
- https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/160929890785a2---nogisamidalo.pdfIn PDF document text
- http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/9eb7e34a27884f6c692450ba63b3980c/9459083446.pdfIn PDF document text
- https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/d89a7f10821e60eb7c84cdaa60637619/votajeturamaduruxazonanaf.pdfIn PDF document text
- http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc4d0cd94a---junujolukupunefawin.pdfIn PDF document text
- https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160841ab61caa6---mabozeronezelifati.pdfIn PDF document text
- http://sea-cruise.ru/ckfinder/userfiles/files/fisolovunudubakumepo.pdfIn PDF document text
- http://castrolmintabolt.hu/images/upload/file/gotilupasikuxinudobafoka.pdfIn PDF document text
- https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/16083f1247c513---xuvirupaluvopivemotibiruf.pdfIn PDF document text
- http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/99cf7d23f4c118d6e25cccd361b9af75/32060008130.pdfIn PDF document text
- https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bdb5217a8dc---tevokateramugukewiwoze.pdfIn PDF document text
- http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/dpcri7jiqmsn9fnu3d6qb20fi6/vinizomuwep.pdfIn PDF document text
- http://usmleworkout.com/files/file/54484376710.pdfIn PDF document text
- http://townsendrogersfamilyreunion.com/clients/9/91/912616e09393d205379ff76530a10a1f/File/29390269994.pdfIn PDF document text
- http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607cce8decaaf---dorabinakitate.pdfIn PDF document text
- https://alianzatours.com/imagenes/file/6880535348.pdfIn PDF document text
- http://summitremodelinginc.com/userfiles/files/bifegofosafeniwokukezu.pdfIn PDF document text
- https://villatoscana-pi.it/userfiles/file/2187139716.pdfIn PDF document text
- https://dutchfansitenetwork.nl/ckfinder/userfiles/files/pugepida.pdfIn PDF document text
- https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/c2fd37d7d576e86a90b871173ddc167e/puvevizizokuzarixut.pdfIn PDF document text
- https://emotionalgift.com/ckfinder/userfiles/files/tugekujatediwi.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=philosophy+why+is+it+importantPDF 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_off0000ed49.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xED49	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010560.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10560	10588 bytes
SHA-256: `1e885505c5f5a25dcb1101f2dc5874c8bba37b9bea716291f6233c65bc371e2e`
`font_02_sfnt_off00011d65.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11D65	16596 bytes
SHA-256: `7b9f8a2528d2b69f0287bdee123e614cd6f2c21d6516a3606e3be818a67edd0b`

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