PDF malware analysis — malicious · 0a593917bc765658

MALICIOUS

PDF

82.9 KB Created: 2021-09-20 10:59:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 0b3c04fcdbcd40e7231170fe905f1c3b SHA-1: 3fc046ef5c5317e14c38bd1cafb1f0e7e3f73480 SHA-256: 0a593917bc765658e7a2b63b94027d5f96953ef831d3fc0be87aff1556a8c821

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall detection indicate a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

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://infrive.ru/uplcv?utm_term=how+to+delete+android+history PDF link annotation
- https://pankajplast.com/ckfinder/userfiles/files/wibosufeb.pdfIn PDF document text
- https://transilvaniafishing.ro/app/webroot/files/userfiles/files/sewimowufozanevozop.pdfIn PDF document text
- http://aranysolyomfeszke.hu/editor_up/68747528259.pdfIn PDF document text
- https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/80f022e5a7f8b154a3de79aabc4411c8/32902609585.pdfIn PDF document text
- https://doanhnghiepvietnam.org/img_duhoc/files/fafenibanope.pdfIn PDF document text
- http://dataction.org/demo/dataction/media/pagodefiwinaj.pdfIn PDF document text
- http://mnwebdesign.dk/userfiles/file/68245917534.pdfIn PDF document text
- https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/ak27r9p1s3qtt6ismsqh0j82qi/valapizabazugezudajufavur.pdfIn PDF document text
- http://paoladebenedetti.eu/userfiles/files/60837602096.pdfIn PDF document text
- http://www.grifin.sk/files/veterisanowot.pdfIn PDF document text
- http://geoman.cz/data/file/94946951024.pdfIn PDF document text
- http://gucaoyun.com/uploads/file/072305068056.pdfIn PDF document text
- http://adhdesign.de/userContent/files/20210908045212-woguxewiwufupenudepaz.pdfIn PDF document text
- https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16133e013369d9---bilukazunarolefatose.pdfIn PDF document text
- http://ukwoodrecycling.com/userfiles/files/zabomadeku.pdfIn PDF document text
- https://autopits-directo.migrupoq.com/ckfinder/userfiles/files/14075369773.pdfIn PDF document text
- https://foundlight.ca/home/foun6192/public_html/files/custom_files/file/tusojexoxotaxi.pdfIn PDF document text
- http://vetportonaccio.it/userfiles/files/74480985797.pdfIn PDF document text
- http://relaxzenter.com/uploads/files/nenixobufuzisowubopo.pdfIn PDF document text
- https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1614432414c733---sakikiwawukuwutafosuguvu.pdfIn PDF document text
- https://unifor975.ca/userfiles/file/63881762993.pdfIn PDF document text
- https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613e6b358eee9---74995555883.pdfIn PDF document text
- http://gnox.vn/upload/files/fuzeposokediravile.pdfIn PDF document text
- http://tcgardening.com/userfiles/file/2021091710290573499.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_off0000e0b0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE0B0	10536 bytes
SHA-256: `44fac923b2bb1e1dc17f7776d45b1adff9c6daa03141dab0acbd80f086366de3`
`font_01_sfnt_off0000f89f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF89F	17272 bytes
SHA-256: `6f3967577634d50498b3354de65a7809f4e9d7ed67c86efd4da3466f98c0a65e`
`font_02_sfnt_off000125bf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x125BF	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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