PDF malware analysis — malicious · 32982d76e9af695f

MALICIOUS

PDF

74.1 KB Created: 2021-09-06 18:11:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: ded5f7239412b6242bc84973a50bec01 SHA-1: 720822885f970c2f8ea0fa4a719ce38f6127b15e SHA-256: 32982d76e9af695f1e33172df2f3878caa7eb27b3574c6109215d12aa9e3355c

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous URLs pointing to various websites, many of which appear to be compromised CMS uploads, suggesting an attempt to redirect users to potentially harmful content. The presence of multiple external URIs and link farm indicators strongly suggests a phishing or malware distribution vector.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

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://pistant.ru/uplcv?utm_term=toastmaster+bread+machine+tbr20h+manual PDF link annotation
- http://picassooutdoorliving.com/fckeditor/userfiles/file/37812447891.pdfIn PDF document text
- https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/16120c2a187fb6---xalovejirevi.pdfIn PDF document text
- https://praward.tw/wp-content/plugins/super-forms/uploads/php/files/381d22020740d02d55ef150d118486f4/40622450284.pdfIn PDF document text
- https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160811faf7be74---famotajawirojuw.pdfIn PDF document text
- https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/6613d4990cb1470f09cc540b8b15f782/fazufutip.pdfIn PDF document text
- http://ekopaczka.pl/imgbrama/files/vodamago.pdfIn PDF document text
- https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/eph05eb0n5dul8a6dma75mgh2e/17611474277.pdfIn PDF document text
- https://aksukartela.com/images_upload/files/4834645745.pdfIn PDF document text
- https://ebooksweb.net/files/file/30934342745.pdfIn PDF document text
- http://stananddiane.com/clients/6/67/672a2699e369d648dd23e03de9deda78/File/31357199185.pdfIn PDF document text
- https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608586e377733---75702543962.pdfIn PDF document text
- http://henca.com/files/details/file/xorekazun.pdfIn PDF document text
- http://infoegrafica.com/userfiles/files/3162881114.pdfIn PDF document text
- http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/1610dfdd0e1f68---5551553289.pdfIn PDF document text
- http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/5675a19dda596ec095a0dd5cf857ea18/sagolomurokoxanoximokopik.pdfIn PDF document text
- https://masihpt1.com/contents//files/sojoz.pdfIn PDF document text
- http://phantasos.org/userfiles/file/20700140702.pdfIn PDF document text
- https://sandzak.best/wp-content/plugins/super-forms/uploads/php/files/0649632f473997f1cb75c775378dd5be/83903252041.pdfIn PDF document text
- https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/04ecd8210d8b73b8b1d8476a04d0a86a/wosodexoguzep.pdfIn PDF document text
- http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b5264e0c85a---66068140523.pdfIn PDF document text
- https://aviseco.ro/userfiles/file/96960718411.pdfIn PDF document text
- https://mosconi.net/userfiles/file/7770093404.pdfIn PDF document text
- https://nanyangtextile.com/userfiles/file/52856474892.pdfIn PDF document text
- https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160750842c7482---31056315588.pdfIn PDF document text
- 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_off0000c08e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC08E	11080 bytes
SHA-256: `8117c5797185674d2bd4ebbbb8b10aceb8450054d6511b8d879ec691cd85d6a0`
`font_01_sfnt_off0000da31.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDA31	15912 bytes
SHA-256: `3ca0e28e85ca501240369e8810a80750a1a8def86a5713ccc86a0d3cb5ba674d`
`font_02_sfnt_off000102c5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x102C5	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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