PDF malware analysis — malicious · 48591676634be523

MALICIOUS

PDF

77.5 KB Created: 2021-09-19 19:35:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 70a94398725d62b9c77e8bafd061073a SHA-1: 133da12fe8e02db81be80448bdf20f19527e56af SHA-256: 48591676634be523d73c3374c27a04d4844eb827f1998b71ea63680ae7f2d7a1

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous links to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the nature of the PDF and the presence of external links indicate a likely attempt to exploit users through social engineering or by directing them to exploit-serving pages.

Machine Learning

Nyx PDF Classifier malicious score 0.9973

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
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.
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://ketchas.ru/uplcv?utm_term=emulator+terbaik+untuk+pubg+mobile PDF link annotation
- http://cabinet-blin.fr/ressource/site-image/files/biriwixevudofo.pdfIn PDF document text
- https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/f939ccfa0c7edd6d80109d35c5462980/fulilutu.pdfIn PDF document text
- https://tailormade-sales-marketing.com/userfiles/file/dosexamokuzavisim.pdfIn PDF document text
- http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c3fd303bb7---57113373800.pdfIn PDF document text
- http://hondatayho.top/img-ngocbao/files/dupamadu.pdfIn PDF document text
- http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613e4ebc2303a---25441325688.pdfIn PDF document text
- http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140a8061874f---33513193131.pdfIn PDF document text
- http://elistaprezentow.pl/userfiles/file/19639217475.pdfIn PDF document text
- https://himalayanwanderer.com/himalayan/userfiles/files/60006389888.pdfIn PDF document text
- https://solelane.com/ckfinder/userfiles/files/wavuxudoseja.pdfIn PDF document text
- http://choragwica.pl/userfiles/file/8503985524.pdfIn PDF document text
- https://ssmahavidyalaya.org/lion/uploadedfiles/fck/files/file/10466240081.pdfIn PDF document text
- https://phuketwebstudio.com/ckfinder/userfiles/files/risadulirirofepaf.pdfIn PDF document text
- https://keyword-lda.pt/site/upload/file/wemifuse.pdfIn PDF document text
- https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/uacbfthjm4tqpl0jtv85877ff6/jegakudabitujuru.pdfIn PDF document text
- http://safiorida.nl/operatori/userfiles/file/xizobumizovagepos.pdfIn PDF document text
- https://stollerco.com/testingsites/advantage_aviation/assets/media/file/diditesen.pdfIn PDF document text
- http://apartamentykunickiego.pl/architekci/public/upload/ckfinder/userfiles/files/98485761205.pdfIn PDF document text
- http://hardiebase.com/uploads/assets/filefile/26750400841.pdfIn PDF document text
- http://dekobonner.de/userfiles/file/41948200630.pdfIn PDF document text
- https://protum.se/file/39433394405.pdfIn PDF document text
- http://thestarbusan.net/FileData/ckfinder/files/20210903_7FD1E03DB85AD646.pdfIn PDF document text
- http://fairbank-ia.org/admin/ckfinder/userfiles/files/57545294313.pdfIn PDF document text
- http://cmuniontravel.com/userfiles/file/71750074266.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_off0000cc8f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCC8F	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000e4a6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE4A6	10740 bytes
SHA-256: `64962087ecd04167251c4ec7d386d1a7b6253c88cb07bec71295a95e9b15f8a3`
`font_02_sfnt_off0000fd04.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFD04	16704 bytes
SHA-256: `e753416338e6f4550d2b4b15f3e6df709b9c65e45e74d886603616f9e1a7531c`

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