PDF malware analysis — malicious · 3e298e697d426b78

MALICIOUS

PDF

80.0 KB Created: 2021-09-07 17:22:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: 5ba970645fc1f32ea4f821550e6ca6b1 SHA-1: dc1447278b4f5f7ed4ec78ee2de5b6270489c15d SHA-256: 3e298e697d426b787c52dff4ca99e64e7e093433190d9464b431d4e49d12902f

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains an embedded JavaScript stream and numerous URLs, many of which point to compromised CMS uploads or disposable hosting, forming a link farm. The primary purpose appears to be directing users to malicious websites, likely for phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9953

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=derek+prince+pdf+free PDF link annotation
- http://historia-bfured.hu/userfiles/file/fedigenuzadotunuxa.pdfIn PDF document text
- https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160954b569b6e3---xidubasanidiw.pdfIn PDF document text
- http://motolargo.pl/userfiles/file/bipojetulowojesavakozo.pdfIn PDF document text
- https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/96c58ce7da1f4413196ce1de51854964/gerojilatizujeg.pdfIn PDF document text
- https://ukmriptek.org/codeIgniter-hmvc/userfiles/files/zuxomusoretidat.pdfIn PDF document text
- http://ceramicaartisticamarsalese.it/userfiles/files/gopefowurife.pdfIn PDF document text
- https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/fbc19dh3mrr9p74fmkgpmokq82/tofodalutin.pdfIn PDF document text
- http://xn--80aafbkbafwdti1ahihccrg.xn--p1ai/pict/file/terudike.pdfIn PDF document text
- https://peoplehelppeople.net/uploads/File/64757678178.pdfIn PDF document text
- http://say-international.eu/userfiles/file/69968765099.pdfIn PDF document text
- http://nhadatv.com/webroot/img/files/99867981749.pdfIn PDF document text
- http://www.tobywells.org/media/fckdir/file/74210557379.pdfIn PDF document text
- http://goldnumber.info/userfiles/file/13832835463.pdfIn PDF document text
- https://citronel.com/userfiles/files/nivujabesurenetel.pdfIn PDF document text
- https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/1e4453147c08c7cb3ff842af351d177f/5580754547.pdfIn PDF document text
- http://wawabed.pl/uploads/userfiles/file/59209036265.pdfIn PDF document text
- https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/sviautknk0b52jdvv5d2hblesa/76114332207.pdfIn PDF document text
- https://spvi.cn/filespath/files/20210807200311.pdfIn PDF document text
- http://interfacetravels.com/app/webroot/js/ckfinder/userfiles/files/82607381103.pdfIn PDF document text
- http://anthonyjcincottalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/mavujoweposemeweg.pdfIn PDF document text
- https://www.vek-bg.com/app/templates/js/ckfinder/userfiles/files/24178161614.pdfIn PDF document text
- http://immobilieninvestors.de/userfiles/file/filawukenesetudugulukes.pdfIn PDF document text
- http://www.bufolari.com/public/immagini/file/tuwabowagewo.pdfIn PDF document text
- http://colantuono.it/userfiles/files/26964719743.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_off0000d474.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD474	10112 bytes
SHA-256: `7b483f36915151111af307fbffc16636ffc1e096e98b27220aee1731195c8083`
`font_01_sfnt_off0000eb14.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEB14	18648 bytes
SHA-256: `6f4c5e3550fbfa2560691aa0d6f8d6e526eb5d41d129110f1d4d13ea6d80324d`
`font_02_sfnt_off00011acb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11ACB	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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