PDF malware analysis — malicious · dc67d67c9be173c0

MALICIOUS

PDF

71.2 KB Created: 2021-09-27 03:57:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 9d07ca04fed026ad638ddb73e892babf SHA-1: a9cd6a5e3d784adc6075e20733f369544aa883cb SHA-256: dc67d67c9be173c0cb5f9fb4f726cd1fabc678bbd716fea84c49349e92270129

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains embedded JavaScript and numerous external URIs, suggesting it is designed to redirect users to potentially harmful websites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests the document's purpose is to act as a link farm, likely for phishing or distributing further malware.

Machine Learning

Nyx PDF Classifier malicious score 0.9947

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
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://crysiq.ru/uplcv?utm_term=me+before+you+meccaila+pdf PDF link annotation
- https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/5add2913a86e56c74b82b9890299de9d/ranavexodojojaf.pdfIn PDF document text
- http://sallytour.com/FileData/ckfinder/files/20210906_D7C05279910D3EF4.pdfIn PDF document text
- http://kyokushin96.ru/admin/ckfinder/userfiles/files/89306447131.pdfIn PDF document text
- https://icrs-as.com/userfiles/file/kubenebizudizag.pdfIn PDF document text
- http://miass.realxenon.ru/uploads/files/73595982723.pdfIn PDF document text
- http://lynxitservices.com/ckfinder/userfiles/files/39017927352.pdfIn PDF document text
- https://probidjp.com/ckfinder/userfiles/files/20210907_053804.pdfIn PDF document text
- http://headlinesdinerla.com/uploads/files/23717687043.pdfIn PDF document text
- http://madmojo.com/fckupload/file/52995342607.pdfIn PDF document text
- http://ahjygjg.com/upload_fck/file/2021-9-13/20210913011014445630.pdfIn PDF document text
- https://coebmsf.com/userfiles/file/vodugofake.pdfIn PDF document text
- http://logopeda-empatia.pl/content/file/24759071006.pdfIn PDF document text
- https://jjpremiers.com/files/90105402436.pdfIn PDF document text
- https://ltssinternational.com/res/wysiwyg/file/79718721487.pdfIn PDF document text
- http://sgpeo.pl/users/file/37264825848.pdfIn PDF document text
- https://dragonexpressml.apnaconsultant.com/userfiles/files/vasob.pdfIn PDF document text
- http://origo.ws/userfiles/file/zejenozizonewezakuj.pdfIn PDF document text
- http://cnmrobotics.com/files/files/17503618678.pdfIn PDF document text
- http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16149d5f977e48---54861559097.pdfIn PDF document text
- http://artgraf24.pl/userfiles/file/14226370316.pdfIn PDF document text
- http://carneiro-sa.pnh.pt/js/ckfinder/userfiles/files/84533606911.pdfIn PDF document text
- http://turbotechnik24.de/userfiles/file/81278881677.pdfIn PDF document text
- http://mybed.tw/uploads/files/202109080722004223.pdfIn PDF document text
- https://jodhpurtravels.com/nbloom/fckuploads/file/sisinuvizi.pdfIn PDF document text
- https://bela.geekers.tw/upload/file_folder/file/27542586519.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_off0000b635.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB635	10756 bytes
SHA-256: `587704a11e1bac99e2a7fe8742238d387b8cd500398d54a1c2cc286814fad7cc`
`font_01_sfnt_off0000cec6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCEC6	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000e6d8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE6D8	16032 bytes
SHA-256: `ffba5f38f7b861c9ba21177991671df364a3b7e40ad0b362e51566eb6914947e`

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