PDF malware analysis — malicious · 2b22ea47f8bceb8a

MALICIOUS

PDF

83.2 KB Created: 2021-09-04 01:24:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 2a1d4cf8974eb3be25633e8ce9de4cdb SHA-1: 5f862607345d88adf7146f2ff96c5b2381856d89 SHA-256: 2b22ea47f8bceb8ab7e1f0da491d6cda1831d8f4deed84e86d38c860919a7429

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised CMS upload directories or disposable hosting, indicating a link farm designed to redirect users to malicious content. The document body is heavily obfuscated and unreadable, providing no direct textual clues, but the heuristic findings strongly suggest a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9912

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
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 http://bona-agra.pl/Upload/file/59182061686.pdf In PDF document text
- http://bannhuaduong.net/upload/files/poviwejuwowepefepuboxatu.pdfIn PDF document text
- http://lctrading-gmbh.com/ckfinder/userfiles/files/dalifukubivaw.pdfIn PDF document text
- https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/c630d945634d238fb460fcece84c6c83/jugiboreb.pdfIn PDF document text
- http://h-st.nl/bestanden/files/pakef.pdfIn PDF document text
- http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609042863651c---64374702344.pdfIn PDF document text
- http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082ad7b0daef---naruwerilavupuge.pdfIn PDF document text
- http://caydinhlang.net/userfiles/image/file/zeritiz.pdfIn PDF document text
- https://golf-tout-terrain.com/publish/page/file/gakoremefixetab.pdfIn PDF document text
- http://goteneplast.se/files/images/file/77328643793.pdfIn PDF document text
- http://chichen.asia/ckfinder/userfiles/files/vogoturipemimezamigax.pdfIn PDF document text
- http://biotop-zamosc.pl/userfiles/file/jezomikiwomufofifalip.pdfIn PDF document text
- https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160bbfdde7794f---52839473787.pdfIn PDF document text
- http://train-in-japan.com/images/blog/file/2303908044.pdfIn PDF document text
- http://barnesfamilyre-union.com/clients/52050/File/53186538513.pdfIn PDF document text
- http://bluecars.pl/userfiles/file/kigelo.pdfIn PDF document text
- http://akvatoria.by/UserFiles/files/pafemibasomopeb.pdfIn PDF document text
- http://ninda.vn/userfiles/files/lidiniwudilinu.pdfIn PDF document text
- http://gymostrov.org/gymostrov/userfiles/file/45928152322.pdfIn PDF document text
- https://27061010.com/uploads/files/202108270244219037.pdfIn PDF document text
- https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/3gk404jkme1gipbhb49abd102n/wijidik.pdfIn PDF document text
- https://yellowstonewildlife.com/zeketajaxopo.pdfIn PDF document text
- https://nadinerogger.ch/userfiles/files/82560414183.pdfIn PDF document text
- http://phuocthuan.vn/images/pic/file/6160384255.pdfIn PDF document text
- http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/sq6h27h24etvgdd8eq89dr1u0a/pimudamukejegasaduvasereg.pdfIn PDF document text
- https://ytdrive.com/CKEdit/upload/files/purazimedi.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=killing+commendatore+english+pdfPDF 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_off0000dcb5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDCB5	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f4c7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF4C7	18744 bytes
SHA-256: `ded166318ec4c89402e0395a88c41297a011686f97b4b6cd98f71b30a6ef3d40`
`font_02_sfnt_off00012563.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12563	11056 bytes
SHA-256: `bdde068c00e769db51e8aeda0e2997f8fb86ce24c1eb35331ccd0032cbf6e6c5`

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