PDF malware analysis — malicious · 25282c272a850790

MALICIOUS

PDF

95.1 KB Created: 2021-09-09 05:54:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18

MD5: 45158746f65a6ab022f8704532bdadee SHA-1: 0848a2350b25148d9f08f9c3ddaf7ac0e7459ed5 SHA-256: 25282c272a85079031c0842708d7287fa60fda5a54d2485ca314d447d42e5f5f

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are part of a link farm hosted on disposable or compromised domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery through these links. The presence of embedded JavaScript suggests an attempt to exploit PDF vulnerabilities or redirect the user programmatically.

Machine Learning

Nyx PDF Classifier malicious score 0.9965

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://catamma.ru/uplcv?utm_term=mickey%27s+twice+upon+a+christmas+123movies PDF link annotation
- http://pyhunlian.com/uploadfile/file/duvasorazalegamik.pdfIn PDF document text
- http://margheritango.it/userfiles/file/gonudulezapiwosanov.pdfIn PDF document text
- https://ginecologmuresan.ro/ckfinder/userfiles/files/milomadaripuwezowade.pdfIn PDF document text
- https://arnetbilgisayar.com/upload/ckfinder/files/rorabisudoxikavojiramusip.pdfIn PDF document text
- http://mclarenquartz.in/ci/userfiles/files/77336442791.pdfIn PDF document text
- https://mongolia-volkslift.com/uploads/files/sepefixofalisegezovudi.pdfIn PDF document text
- http://indel.sk/userfiles/file/darebuxaxokijozub.pdfIn PDF document text
- http://idominjazz.com/fckeditor/userfiles/image/bozanodurefa.pdfIn PDF document text
- http://www.martiusstaden.org.br/js/ckfinder/userfiles/files/zejasesiguwebutifixopub.pdfIn PDF document text
- http://stuarteisbrucklaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/74042360828.pdfIn PDF document text
- http://zit-tech.com/userfiles/files/rojofomafa.pdfIn PDF document text
- http://vtvxm.vn/userfiles/file/67590677676.pdfIn PDF document text
- https://drakbera.com/ckeditor/ckfinder/userfiles/files/nakuzale.pdfIn PDF document text
- https://www.l-games.jp/js/ckfinder/userfiles/files/9172717693.pdfIn PDF document text
- http://telecycling.info/files/file/14764571433.pdfIn PDF document text
- https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/848e86e06e192fa610e00e8a01a575bb/30335012426.pdfIn PDF document text
- http://olynskiconstruction.com/pics/file/78551981681.pdfIn PDF document text
- http://vakaruinzinerija.lt/userfiles/file/vijikuworuvetufupunosu.pdfIn PDF document text
- https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/75c5de7ee57a3b40a9493932e59c0a42/2920738316.pdfIn PDF document text
- https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1612f46db07fd6---92546405870.pdfIn PDF document text
- https://joinvita.com/neu/userfiles/file/44488969503.pdfIn PDF document text
- https://mamo-tato.ro/userfiles/file/27086393966.pdfIn PDF document text
- https://habibitours.com/ckfinder/userfiles/files/xateranidiror.pdfIn PDF document text
- http://qualityspices.in/ckuploads/files/23330424265.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_off00010b3b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10B3B	11424 bytes
SHA-256: `4e405d29469407b2d6c9f307437c3f2b5f4e3712f8e2c51d7f2c75aba364317f`
`font_01_sfnt_off00012649.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12649	18372 bytes
SHA-256: `da25e6d6cd3676334d0294d75c0d49ecd3b8dce7f0b4cb33c93d02f047e591db`
`font_02_sfnt_off00015638.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x15638	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

Open this report in the interactive analyzer, or submit your own file for analysis.