PDF malware analysis — malicious · 2d6e88d89066c983

MALICIOUS

PDF

80.1 KB Created: 2021-09-09 01:36:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: 787775318f55b5068b935f013b860987 SHA-1: aefbcfee107151e538be44a8a61dbb326a339794 SHA-256: 2d6e88d89066c983c433b816701d03889f9b06759082e9207e71a5369f84a315

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous URLs, many of which are hosted on compromised websites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to trick users into downloading further malicious content by presenting itself as a printer driver utility.

Machine Learning

Nyx PDF Classifier malicious score 0.9949

Heuristics 7

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.
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 http://www.anclupnapoli.it/userfiles/file/7860717259.pdf In PDF document text
- http://masterref.ru/editorfiles/file/bosatuzogewisu.pdfIn PDF document text
- http://gelikonline.ru/content/Files/2289685683.pdfIn PDF document text
- https://nhahangphongcanh.com/uploads/files/99912390639.pdfIn PDF document text
- http://masonhn.com/d/files/mozirolerezixeximidiw.pdfIn PDF document text
- https://ra7a7p-h3ba7.com/contents/files/malufidifu.pdfIn PDF document text
- http://www.bongbansaigon.com/uploads/files/84652064081.pdfIn PDF document text
- http://geyikkimya.com/userfiles/upload/file/zanudaxewuvoxibawajitog.pdfIn PDF document text
- http://scvumaichiramen.com/uploads/files/26397320390.pdfIn PDF document text
- https://hotelpancharatna.com/assets/userfiles/files/8988937811.pdfIn PDF document text
- http://autoneza.cz/UserFiles/File/20492500062.pdfIn PDF document text
- http://inwama4.vn/webroot/img/files/71273500822.pdfIn PDF document text
- https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/223bd155946ab0032daaa94b32e75592/nenatuluxito.pdfIn PDF document text
- https://jakspravnenapsa.cz/userfiles/file/satenexodejeraposinulibew.pdfIn PDF document text
- https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/0a081e1eabfbf43919b9ba9508345611/xolet.pdfIn PDF document text
- https://hometutorsdelhi.com/userfiles/files/zebimowopubedidunipele.pdfIn PDF document text
- http://angelascanu.it/uploads/file/zoduvupesoxoxexa.pdfIn PDF document text
- https://dongciao.com/uploads/files/202109012225295314.pdfIn PDF document text
- http://groupementpecheduloir.com/ckfinder/userfiles/files/xozifasetomuwibiduwi.pdfIn PDF document text
- https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/161393a33ce6cc---lexuxebeduwotababobu.pdfIn PDF document text
- https://sfasg.jp/js/ckfinder/userfiles/files/salumaduxareduregu.pdfIn PDF document text
- https://weboonline.com/ckfinder/userfiles/files/rezogenudorim.pdfIn PDF document text
- http://mcserpenti.com/userfiles/file/dolawofiwezazatamez.pdfIn PDF document text
- https://www.bosingels.nl/ckfinder/userfiles/files/dofim.pdfIn PDF document text
- http://hantechwelding.com/userfiles/file/2021090722563373499.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=pdf+printer+driver+windows+xpPDF 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_off0000d4ec.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD4EC	17744 bytes
SHA-256: `a2856eabd1a2add59da16910562c0e2c645f58e884e0f8c97290d2814ed1405e`
`font_01_sfnt_off000102d0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x102D0	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00011ae7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11AE7	10540 bytes
SHA-256: `e6c769f1dec55938cf69a0fff570436d098841c962ec6eaf35c7c014a26dc2cb`

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