PDF malware analysis — malicious · afadbbc235fb6654

MALICIOUS

PDF

81.8 KB Created: 2021-08-14 19:57:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: f544c4c5b57d5264f7478fd050cb1e53 SHA-1: ee954ec2ac176127720542920d0d7f112f8ae997 SHA-256: afadbbc235fb665485a7c7fe3f4bb4e0fbd0a9ab0ea66e13f17ad11630fa2d15

162 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised WordPress sites acting as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware hosting sites. The presence of embedded JavaScript suggests an attempt to execute malicious code within the PDF viewer.

Machine Learning

Nyx PDF Classifier malicious score 0.8689

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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
External URI info PDF_URI

PDF contains an external URL action
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://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/161106d1ac1362---mikakukoxidaboratejapux.pdf In PDF document text
- http://onlineexpert.in/userfiles/file/60535408673.pdfIn PDF document text
- http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/ha73cs6slr4tsqmodop7go08t4/gikojuwulori.pdfIn PDF document text
- http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f472062b8dd---bofobemogijojo.pdfIn PDF document text
- http://bluecars.pl/userfiles/file/dubovanorimaw.pdfIn PDF document text
- http://adance0112.com/upfile/editor/file/nomiviniz.pdfIn PDF document text
- https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/dkhfqnvps3634eua95prevre7t/xarorivapes.pdfIn PDF document text
- https://marosme.ro/hirek/file/kefitadibizakuze.pdfIn PDF document text
- https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/16098169be5b11---wubitelodaxa.pdfIn PDF document text
- http://thecuriosityshot.com/mofufexuwevixadoniguva.pdfIn PDF document text
- http://cathyknightwaite.com/ckfinder/userfiles/files/zugokukogifaxuvudogepi.pdfIn PDF document text
- http://schodylux.pl/userfiles/file/dajesodetarigubotida.pdfIn PDF document text
- http://whitefamilyreunion2020.org/clients/4/4c/4c64578d40ee165aaf486c9a1ef3309b/File/76315558734.pdfIn PDF document text
- https://geya99.com/ckfinder/userfiles/files/7287139741.pdfIn PDF document text
- http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c79f8f39143---78788940836.pdfIn PDF document text
- https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608c3218ca66c---vabonokokejunutobe.pdfIn PDF document text
- http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bbae6cd14ec---42829086410.pdfIn PDF document text
- http://jkohut.pl/file/sajuvakikewuruvuxejofaz.pdfIn PDF document text
- https://langestrand.se/anvandarbilder/204/files/93081982433.pdfIn PDF document text
- http://eurogeographyjournal.eu/admin/fckfiles/file/99820527581.pdfIn PDF document text
- http://webdulich.com/js/ckfinder/userfiles/files/jobofalonaxuzepa.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=misumi+india+spring+catalogue+pdfPDF link annotation
- 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_off0000e29d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE29D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000faaa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFAAA	1828 bytes
SHA-256: `84348684a59760915e496120e81b0b413b7d26358fcf157bf500dfae315630ba`
`font_02_sfnt_off0001034f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1034F	16996 bytes
SHA-256: `72344735b68048a651cc8c0e359c48f75b06b5a12061758396bd136a9217ff2d`
`font_03_sfnt_off00012fea.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12FEA	11056 bytes
SHA-256: `048e3cc3e61b7de8e28191d452cf397c8d23ade8e5d8eb91ebbe2690d7c1982a`

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