PDF malware analysis — malicious · c6a7e52a1a81202f

MALICIOUS

PDF

84.3 KB Created: 2021-09-19 00:18:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: fb14277e1ca16737eb4788251366dbdc SHA-1: 489c9e439d49c74f88f92d37e0053f024a54bd96 SHA-256: c6a7e52a1a81202f692ec4dd9c9cb5db1498fec78773e91c1051f7012f1fe355

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to PDF files on various domains, suggesting a link farm or redirection mechanism. The PDF structure and embedded content, though heavily obfuscated, are indicative of a phishing or malware distribution lure, likely leveraging external links to achieve its objective. No scripts were extracted, but the presence of numerous external links points to a T1566.001 (Spearphishing Attachment) attack pattern.

Machine Learning

Nyx PDF Classifier malicious score 0.9955

Heuristics 5

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.
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 http://ever-pioneer.com/upload/files/8006662041.pdf In PDF document text
- http://xmzhj.com/UserFiles/file/tujunilajetogunogeximezad.pdfIn PDF document text
- https://www.grdr.org/paidel/ckfinder/userfiles/files/22484949327.pdfIn PDF document text
- https://printjet.pl/pliki_user/File/neguparutozod.pdfIn PDF document text
- http://habitat3.eu/userfiles/files/13453693327.pdfIn PDF document text
- https://hobbes-group.com/upload/files/volototezakasi.pdfIn PDF document text
- http://fitsiluet.cz/data/file/fufiriwopu.pdfIn PDF document text
- http://htwy.com/upload/file/69693661418.pdfIn PDF document text
- http://saeronbio.com/userData/board/file/rozibedem.pdfIn PDF document text
- https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146553c4f3a7---91715262315.pdfIn PDF document text
- https://skinrepublic.vn/webroot/img/files/82118259298.pdfIn PDF document text
- http://gavinlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pixodazi.pdfIn PDF document text
- http://hftyby.com/upload_fck/file/2021-9-2/20210902044228928986.pdfIn PDF document text
- http://i-physiology.ru/upload/mexitudiladigazawov.pdfIn PDF document text
- https://shieldtech.cz/ckfinder/userfiles/files/xunavanovitotoza.pdfIn PDF document text
- https://fullgame.hu/uploads/files/ripixugezoluladubokif.pdfIn PDF document text
- https://bamfieldrental.com/userfiles/file/15976988271.pdfIn PDF document text
- https://borgopitti.it/userfiles/file/93923148392.pdfIn PDF document text
- http://okeefesreef.com/ckfinder/userfiles/files/megukapagomazori.pdfIn PDF document text
- http://autosoftware.company/autoresponders_images/files/rugifekinuwemurix.pdfIn PDF document text
- https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/s3mpo5mgvdhdf4ae8d9rk0f5l6/rapowuredadevalukik.pdfIn PDF document text
- https://haysalon.com/public_html/userfiles/file/fositodefa.pdfIn PDF document text
- http://absolutelyneon.com/userfiles/file/21695974715.pdfIn PDF document text
- http://yibetter.com/data/files/65654104603.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=turn+off+an+android+phonePDF link annotation
- 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_off0000e5cb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE5CB	17908 bytes
SHA-256: `9265b03049047a52a8956774b72c70197eab2aa0d1691a419fe14be8f5e28508`
`font_01_sfnt_off00011498.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11498	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00012caf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12CAF	10348 bytes
SHA-256: `007ad0824c7aa7e3cf8e133acc9e7ff0c5b64a07bbf751e8cd25f4d1b5522ba4`

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