PDF malware analysis — malicious · 12fabb12c3b0c70d

MALICIOUS

PDF

75.7 KB Created: 2021-09-12 20:27:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 48a8b3a4bef3bbbef2bf51e674c77240 SHA-1: 056f61a478adc8c573aff4374de26b8237a40602 SHA-256: 12fabb12c3b0c70d6c9fd43cda1d555b6920e261ae8f2ea310955ace519ededd

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ClamAV and an ML classifier as malicious. It contains a link farm pointing to compromised WordPress upload directories, suggesting an attempt to host malicious content or phishing pages. The presence of multiple unknown URLs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicate a coordinated effort to distribute malicious links.

Machine Learning

Nyx PDF Classifier malicious score 0.9901

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://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16138a44454646---binirazodagipogoxo.pdf In PDF document text
- http://ain.proximeo.com/ckfinder/userfiles/files/poretiguzajabaveme.pdfIn PDF document text
- https://gedayapi.com/userfiles/file/jubavowezebabuviviwo.pdfIn PDF document text
- http://ramenzoni.eu/userfiles/files/bopumano.pdfIn PDF document text
- http://gelikonline.ru/content/Files/balomo.pdfIn PDF document text
- http://www.ppk-kp3k.kkp.go.id/ver2/extra/ckfinder/core/connector/php/media/ckfinder/files/25619817413.pdfIn PDF document text
- https://hssanesteban.cl/files/janafezumozalobafituxin.pdfIn PDF document text
- https://mvmdigital.gr/files/files/zuzusavululegivopakogozol.pdfIn PDF document text
- http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1613a7b82d1bbe---susojidefakofewifivebi.pdfIn PDF document text
- http://vietsonplastic.com/uploads/userfiles/file/5847435215.pdfIn PDF document text
- https://noithathoaphat11.com/upload/files/54739938436.pdfIn PDF document text
- http://aldobini.it/userfiles/files/bokuwirujedol.pdfIn PDF document text
- https://ohcsi.com/ckfinder/userfiles/files/zoputese.pdfIn PDF document text
- http://appartementslisa.it/an3_Uploads/file/26569591381.pdfIn PDF document text
- https://ppkh.net/userfiles/file/2447889833.pdfIn PDF document text
- https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/868304b15c87bc9b8401c65ce0a860f7/mukovudilemolufegum.pdfIn PDF document text
- http://sonarkella.com/userfiles/file/10305535277.pdfIn PDF document text
- http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/161359df01ae8d---dadibelazenefed.pdfIn PDF document text
- http://eatatrudy.com/uploads/files/88206432249.pdfIn PDF document text
- http://galaxyjewel.cn/uploadfile/files/44780469557.pdfIn PDF document text
- http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/16131b7272599d---bogabedeviwate.pdfIn PDF document text
- http://topaslt.com/userfiles/file/18205578162.pdfIn PDF document text
- http://moscowfashion.net/content/xuploadimages/file/25314754560.pdfIn PDF document text
- http://chrisnoblelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/novunavoperinevefab.pdfIn PDF document text
- https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/09bbe33d65f9f01ae41068cc6b3f6786/87702246861.pdfIn PDF document text
- http://unitec-egypt.net/userfiles/file/rinuguj.pdfIn PDF document text
- https://seedcambodia.org/htdocs/cljr/data/files/fibewabu.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=android+chromecast+tutorialPDF 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_off0000c30c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC30C	17340 bytes
SHA-256: `de37d598b55695c934cc2e3b0f5dd984c8f16f06c083b513ffce94e438d89aeb`
`font_01_sfnt_off0000f098.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF098	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000108af.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x108AF	10716 bytes
SHA-256: `e71ea2d2995d660449d515ff20718fd5944b19a055b1226eb1efdd526a4c5730`

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