PDF malware analysis — malicious · d362c6646d96d0a4

MALICIOUS

PDF

74.1 KB Created: 2021-09-17 03:58:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: a80f42854422e65c01c88255c9b4e27c SHA-1: 8e0196d13dec7488ef2f6012b53c3b95ee9931da SHA-256: d362c6646d96d0a412364f1107ff2b597e4ca6b4cddfd9b628038d14336add2e

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs pointing to various domains, consistent with a link farm or SEO manipulation tactic. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it may leverage embedded JavaScript or other exploits to redirect users to these potentially harmful sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9976

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 https://noriupapildu.lt/ckfinder/userfiles/files/77466600464.pdf In PDF document text
- http://xn--80akoseq9f.xn--p1ai/userfiles/file/vadalidonurumapuwuwulutu.pdfIn PDF document text
- http://yesfabric.com/images/upload/File/87839638787.pdfIn PDF document text
- http://caratow.eu/userfiles/file/mujisoxemiwomi.pdfIn PDF document text
- https://lanhcongnghiepthinhphat.com/upload/files/22230894872.pdfIn PDF document text
- https://aynispirit.nl/userfiles/file/46951816061.pdfIn PDF document text
- http://jeyadhurgatemple.com/userfiles/file/13661455321.pdfIn PDF document text
- http://depcip.com/app/views/panel/ckfinder/userfiles/files/mexivibe.pdfIn PDF document text
- https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613304a6b2625---nuzosopijum.pdfIn PDF document text
- http://moestuinwebshop.nl/userfiles/file/bapikusagukawelu.pdfIn PDF document text
- http://qhzs88.com/admin/fckeditor_upfiles/file/2021090713571680554.pdfIn PDF document text
- http://www.gamylai.vn/uploads/files/pirefiwadagenej.pdfIn PDF document text
- https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141b80c8c2c4---rukafal.pdfIn PDF document text
- https://vhssirimpanam.org/ckfinder/userfiles/files/85393304466.pdfIn PDF document text
- https://mtmnetwork.net/uploadEditor/files/88552110809.pdfIn PDF document text
- http://thebookmarkcafe.com/uploads/files/67336763068.pdfIn PDF document text
- https://lenaoyunlar.com/calisma2/files/uploads/83668007542.pdfIn PDF document text
- http://www.onlinenieuwsbriefversturen.nl/gebruikers/afbeeldingen/55643565581.pdfIn PDF document text
- https://parlagame.com/calisma2/files/uploads/89288184533.pdfIn PDF document text
- http://maginsaatmetal.com/resimlerfiles/turuwifuze.pdfIn PDF document text
- https://webmakler.org/userfiles/file/80558578877.pdfIn PDF document text
- http://oshcongregation.com/userfiles/file/63907967377.pdfIn PDF document text
- http://de.ruben.pl/ckfinder/userfiles/files/xepofidixanelix.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=nouns+that+start+with+an+fPDF 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_off0000c378.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC378	15924 bytes
SHA-256: `40227e9400729312277e53ec3cfaf4aaf976b7e8fa1458c38aa0ca197067e3b0`
`font_01_sfnt_off0000eb4e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEB4E	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00010365.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10365	10296 bytes
SHA-256: `f609eca5a4a4d62b22ec03971200a9c527321664debda8c4b19578ff2c36c929`

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