PDF malware analysis — malicious · d14825076ee2069d

MALICIOUS

PDF

91.2 KB Created: 2021-09-09 12:04:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 15132b2c8355db946c3ba10da5f99c13 SHA-1: 165e9623d8daaf5342e36fd2e91a797956800c1e SHA-256: d14825076ee2069d849282910c2d761f0aecfc8d2a9965c5796ac76335b48611

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which point to link farms on disposable hosting or compromised WordPress sites. This suggests the document is designed to redirect users to malicious destinations, likely for phishing or to download further malware. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9973

Heuristics 7

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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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://laborke.ru/uplcv?utm_term=electrical+energy+flow+diagram PDF link annotation
- http://koppeika.ru/userfiles/file/jawufusagijemepawimup.pdfIn PDF document text
- https://acrgroup.nl/userfiles/file/64569273836.pdfIn PDF document text
- http://mixline.ru/img/lib/file/bivetofaz.pdfIn PDF document text
- http://amsuatrust.org/survey/userfiles/files/xivitikobubozobopegapaxi.pdfIn PDF document text
- http://anais.terminarz.online/kosmetyczka/krakow/files/lulasotizekevutap.pdfIn PDF document text
- https://www.truck-transport.com/ckfinder/userfiles/files/vutefifetufar.pdfIn PDF document text
- https://bushregenerators.info/userfiles/files/jabilivisem.pdfIn PDF document text
- http://gutachterbewertung.de/userfiles/file/15288956049.pdfIn PDF document text
- https://keiba-like.biz/js/ckfinder/userfiles/files/1141997582.pdfIn PDF document text
- http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16137f8d3e9e80---58061433905.pdfIn PDF document text
- http://phuvuongcorp.com/luutru/files/7615478250.pdfIn PDF document text
- https://doctornhospital.com/banglanews24/editorsfiles/files/xasewetefegegosaz.pdfIn PDF document text
- https://www.parquesanalbertohurtado.cl/ckfinder/userfiles/files/givulokafenogo.pdfIn PDF document text
- http://strandedtattoo.info/file/josoporokavof.pdfIn PDF document text
- http://allier.proximeo.com/ckfinder/userfiles/files/ganavinimisagodupenopi.pdfIn PDF document text
- http://stavebnevyrobky.sk/www/upload/files/saxatavujakefukivaxoj.pdfIn PDF document text
- https://jensbrode.de/files/file/5877887098.pdfIn PDF document text
- http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613788ba10a19---watagagurul.pdfIn PDF document text
- http://nmways.com/uploads/fckupload/file/29188849595.pdfIn PDF document text
- http://falconltd.pl/cache/file/joresugi.pdfIn PDF document text
- https://ktmcollege.org/public_html/userfiles/file/15579191961.pdfIn PDF document text
- http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/9fad8923a9d5de0ee3deafea59430e0e/95662328769.pdfIn PDF document text
- http://rencontres-icare.org/userfiles/file/28009767124.pdfIn PDF document text
- http://fnathservices.com/upload/file/35000288755.pdfIn PDF document text
- http://globalcenterhotels.com/bot/ckfinder/uf/files/xarikunodokezabo.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_off0000fc2a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFC2A	19016 bytes
SHA-256: `d3867fbc6184fdc89766bd50d64409043bb8a3411cc1c0d2cf0123d844fe5e9f`
`font_01_sfnt_off00012dd7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12DD7	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000145ee.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x145EE	10836 bytes
SHA-256: `177c69da5ada341cde7ece39f070c59c61a3b04a08290d9e0baac47589e0e6b7`

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