PDF malware analysis — malicious · 8768eb72f6e8ecb5

MALICIOUS

PDF

87.5 KB Created: 2021-07-01 09:19:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: 2792ab382bcd3cd68d84c000b523671c SHA-1: 3c3fe7af34cd6ec8405e1561778c5c1546808881 SHA-256: 8768eb72f6e8ecb57d473c2f8f2646ec74e7b63ec59c4b6fbc607d6fb9d47ba1

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other domains, likely serving as a distribution point for phishing or malware. The presence of multiple distinct hosts and the use of 'utm_term' parameters suggest an attempt to obscure the true destination and potentially leverage SEO tactics for distribution.

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 https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/4ed222df1a5c07b5d0e68d983e2220e4/pelar.pdf In PDF document text
- http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcd580936bb---10609571487.pdfIn PDF document text
- https://roomart.uz/ckfinder/userfiles/files/vefuzunibupiwodulok.pdfIn PDF document text
- http://radissonhoteltraining.com/userfiles/file/4759616806.pdfIn PDF document text
- https://mimpishio2.net/contents//files/66021883189.pdfIn PDF document text
- http://tiramisu-o.com/yamituki-n/uploads/files/81667516173.pdfIn PDF document text
- http://xn--o39a91gvwm83kbsn.net/FileData/ckfinder/files/20210611_B9AAAD4DA0C6968B.pdfIn PDF document text
- https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/723092e244ed9c8b83f304d13e19aaa0/28518229688.pdfIn PDF document text
- http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160b0f5b55002c---22873089484.pdfIn PDF document text
- http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c4861d88fb8---viraxe.pdfIn PDF document text
- http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160723d7db2749---sifanebapinadoz.pdfIn PDF document text
- http://abacusnancy.com/userfiles/file/xuvalutipuduvasono.pdfIn PDF document text
- https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/160afcf8da9784---10277842832.pdfIn PDF document text
- http://arch-teh.com/pic/userfile/nepafamolisi.pdfIn PDF document text
- http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b9c8c2aa50f---rirugenalupofatiwubonofad.pdfIn PDF document text
- http://fonnepal.org/userfiles/file/9189954286.pdfIn PDF document text
- http://forglass.sk/userfiles/file/zigakodoritozefogijedan.pdfIn PDF document text
- https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4d852cae7c22078681fbed0398ca25a0/rejojalik.pdfIn PDF document text
- http://wxeina.com/userfiles/files/neximadipodesetopab.pdfIn PDF document text
- https://editions-tlp.fr/ckfinder/userfiles/files/56920305204.pdfIn PDF document text
- http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f43cf12d11---97953887424.pdfIn PDF document text
- https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c3088ad4772---91836277060.pdfIn PDF document text
- http://tipiland.net/upload/file/juboxab.pdfIn PDF document text
- http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/16094743355137---xidijamezujidafegom.pdfIn PDF document text
- http://botosani.ro/img/uploads/file/48214716099.pdfIn PDF document text
- https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607ffd7fda6ae---zawujerupirukusunodugeti.pdfIn PDF document text
- http://neurooperations.com/ckfinder/userfiles/files/7715416665.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=there%27s+a+sucker+born+every+minutePDF 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_off0000eab8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEAB8	18992 bytes
SHA-256: `ee5ea94c80e79845478f1c8f32a2e1e5a58cf33081079bca42c707d4f16bc9c8`
`font_01_sfnt_off00011cf1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11CF1	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00013508.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13508	10960 bytes
SHA-256: `306ff2e07abc5d2696ae7ddecc8a300e94f71ab450b7c33d35125fc4253d4037`

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