PDF malware analysis — malicious · 4a9586329d3c98ef

MALICIOUS

PDF

91.4 KB Created: 2021-09-04 10:53:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: e0df62a1f0009b5e7d76595811ebd806 SHA-1: 42e0cc3ad2c31c07fcc5c5e19095f857acc4022a SHA-256: 4a9586329d3c98efe86387310d94c65c594b0b16cf5318855d5b173b2e3e0c5a

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised CMS uploads and disposable hosting, indicating a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to lure users to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9726

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://planet-pvc.com/upload/files/38020519179.pdf In PDF document text
- http://veterinariacomportamentale.it/userfiles/files/83272686436.pdfIn PDF document text
- http://pastoret.it/userfiles/files/58982425484.pdfIn PDF document text
- https://tongdaidoanhnghiep.com/app/webroot/upload/files/vubovudozowadudoditufu.pdfIn PDF document text
- https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/as154s7l99nupcvs0ittbqjj65/59467445963.pdfIn PDF document text
- https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/9f1fcd0fbdffcfe7afea0f471faf538a/wanad.pdfIn PDF document text
- https://heatingboiler.ca/fck_upload/file/77843924779.pdfIn PDF document text
- https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/a4871b6bd6b41c2ac8527f2331247a7c/sopunabewuzi.pdfIn PDF document text
- http://abwva.com/uploads/files/wejerupopapefafad.pdfIn PDF document text
- http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609499bfcda5a---voruguv.pdfIn PDF document text
- https://makanbanyak.net/contents/files/48191630059.pdfIn PDF document text
- http://hugslock.com/app/webroot/img/files/rololijat.pdfIn PDF document text
- https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073b086d3336---849875821.pdfIn PDF document text
- https://artbynela.com/uploads/file/69545625282.pdfIn PDF document text
- https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/569fb2edd28207dc8621f69721bf1f6b/96267303106.pdfIn PDF document text
- http://jandenzobv.com/image_uploads/file/xezuv.pdfIn PDF document text
- https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/ebd4a686ca497e0c39b35035fd7aec29/visopotitawagas.pdfIn PDF document text
- http://tobn56.com/UpFiles/file/samenokegajopofubatotawu.pdfIn PDF document text
- https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093e7eaabf6f---23242949232.pdfIn PDF document text
- http://elise.pe/images/file/wetulef.pdfIn PDF document text
- https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/a85l5sg8f9uqm4knf1qdf2he60/lufabojitigowuxoxukobotuw.pdfIn PDF document text
- https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/c360655afd568149ed08fd5f6a86b089/17707339265.pdfIn PDF document text
- http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160786b5a7e878---19933783591.pdfIn PDF document text
- http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/16117f74c6dae8---62697047743.pdfIn PDF document text
- http://orosweb.hu/ckfinder/userfiles/files/3293842549.pdfIn PDF document text
- https://walkandsmile.com/userfiles/file/webotemus.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=fiat+ducato+2018+workshop+manualPDF 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_006_off00014335.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x14335	17408 bytes
SHA-256: `2c6ab4901e465706c5977d465f60cb7718adddf97c184988abfeb1ac47e2a73e`
`font_00_sfnt_off0000e097.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE097	11404 bytes
SHA-256: `85e8c25d366224d86bda0e4bbe19b8c2ed272cc8359f78292d428a7d73bf7ae3`
`font_01_sfnt_off0000fb6b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFB6B	18352 bytes
SHA-256: `40e7f494bb10451d7896dfcfd759a6de2ed4b4e8d2cf9cd48c62f10da864d38b`
`font_02_sfnt_off00012b24.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12B24	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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