PDF malware analysis — malicious · 1e64f23183c72633

MALICIOUS

PDF

85.3 KB Created: 2021-09-16 07:36:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: ed27c0008b53183de0d2529c2480aea0 SHA-1: ab5328064a339ad3711f00c4ccfa5765aa88372b SHA-256: 1e64f23183c726339f0c2bc9eca02a26a5183b708f94215739fd3b8d2df9d5b2

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains an embedded JavaScript stream and numerous external URIs pointing to disposable domains, indicating a phishing or redirection attempt. The document body is heavily obfuscated and unreadable, suggesting an attempt to hide its malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://irlanc.ru/uplcv?utm_term=google+speech+recognition+android PDF link annotation
- https://sardavetri.it/userfiles/file/keremefiwew.pdfIn PDF document text
- http://versobrokers.eu/userfiles/files/31237749629.pdfIn PDF document text
- https://reaga.net/js/ckfinder/userfiles/files/1297794023.pdfIn PDF document text
- https://dijitalsanat.link/upload/files/21393801964.pdfIn PDF document text
- http://www.florentmaussion.net/userfiles/File/suvokivumajuxin.pdfIn PDF document text
- https://internationalmedia.com/userfiles/file/difate.pdfIn PDF document text
- http://bellina.pl/userfiles/file/9338764599.pdfIn PDF document text
- http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161343f7a5adc3---37390228391.pdfIn PDF document text
- http://mtjjt.com/2013/upload/article/files/210906011236263697me97y.pdfIn PDF document text
- https://magnanelli.com/userfiles/file/702798315.pdfIn PDF document text
- https://hotellemaritime.com/hotel/upload/files/laforopepopat.pdfIn PDF document text
- https://unitedfightalliance.jordanadams.com/ckfinder/userfiles/files/5706606160.pdfIn PDF document text
- http://synowka.pl/galeria/file/xizosimebetarapuladilupuk.pdfIn PDF document text
- https://sandp-engineering.com/ckfinder/userfiles/files/16887831708.pdfIn PDF document text
- http://immopolignano.lu/images/27185724534.pdfIn PDF document text
- http://m-camper.ru/ckfinder/userfiles/files/sosalijila.pdfIn PDF document text
- https://defi128.phpascal.com/userfiles/files/vumulagibi.pdfIn PDF document text
- https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/161319d9f4ed80---16395175786.pdfIn PDF document text
- http://sevennews.com.br/ckfinder/userfiles/files/rodikosobatuxaperofatak.pdfIn PDF document text
- http://soupworld.de/upload/file/6099574248.pdfIn PDF document text
- https://pomacanthe-art.fr/imagebeforeafter/files/wazuzusavasabowufuxuratoj.pdfIn PDF document text
- http://www.creativitaecomunicazione.it/js/lib/ckfinder/userfiles/files/6852936673.pdfIn PDF document text
- https://aldwalia.com/userfiles/files/45246677248.pdfIn PDF document text
- http://resurrection-life.net/userfiles/files/52670005758.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_off0000e538.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE538	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000fd4a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFD4A	19044 bytes
SHA-256: `cddfa205a2a3b9698ae35ffd08757025b2521dbd69254b89434e4dd8961d0cf1`
`font_02_sfnt_off00012ebf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12EBF	10832 bytes
SHA-256: `edd023b217b8c215f5be33907ab6108604404d48c2bf85375b4e7139808506f4`

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