PDF malware analysis — malicious · aba34a9369906ae1

MALICIOUS

PDF

67.9 KB Created: 2021-09-16 00:43:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23

MD5: 508fa5c9d8911fd817a0f999a9f58e63 SHA-1: 8cdcb151a6ba625e7fb473bf5b27c8bae6839091 SHA-256: aba34a9369906ae1d413a9c65588be938a296c8ae918f053bc2c54aa6a8ad567

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file is identified as a malicious PDF by ClamAV. Heuristics indicate it functions as a link farm, with numerous distinct hosts and UTM parameters, suggesting a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to potentially harmful content.

Machine Learning

Nyx PDF Classifier suspicious score 0.3348

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
PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED

The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
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://alsultantrading.ae/userfiles/files/gisorugepurasom.pdf In PDF document text
- https://susta.vn/userfiles/file/2924204360.pdfIn PDF document text
- http://le-lemniscus-incandescent.fr/ckeditor/upload/files/kofenupadik.pdfIn PDF document text
- http://tjsyjdq.com/v15/Upload/file/202196174464041.pdfIn PDF document text
- http://pibar.tw/uploads/files/202109051056489932.pdfIn PDF document text
- http://nessie-vinylcare.com/file/bilifavuxofejagotogi.pdfIn PDF document text
- http://radio-salsa.fr/php/rs/filesupload/file/tejexopapikuwoj.pdfIn PDF document text
- http://btsoft.vn/uploads/files/29020388173.pdfIn PDF document text
- http://onishi-kyosendo.jp/archive/bajiwaba.pdfIn PDF document text
- http://larben.cz/media/images/upload/file/5653893933.pdfIn PDF document text
- http://clinicaveterinariabilancino.it/userfiles/files/vapojerapur.pdfIn PDF document text
- https://floridahouselottery.com/test/userfiles/file/86495272988.pdfIn PDF document text
- https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/ud9hpvhcdehht5aatk9kfs27h7/8975983648.pdfIn PDF document text
- http://ilturismoinitalia.it/userfiles/files/xirutibajunali.pdfIn PDF document text
- http://elcwma.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/80333068208.pdfIn PDF document text
- http://yugang360.com/upload_fck/file/2021-9-12/20210912041933759764.pdfIn PDF document text
- http://cancercareresearch.com/userfiles/file/25113317313.pdfIn PDF document text
- https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/pt408ufh73gvr04mnjivd40v50/givetazekolivutegifo.pdfIn PDF document text
- http://studioambienteterritorio.it/userfiles/files/80519972439.pdfIn PDF document text
- http://sancheonglittletheaters.com/upload/userfiles/2021/09/files/210906212850.pdfIn PDF document text
- http://relaxzenter.com/uploads/files/xeletunobejenoz.pdfIn PDF document text
- http://autosklo.sk/pictures/file/gufaw.pdfIn PDF document text
- https://agriplan-rs.com/dados/ckfinder/files/zuzumobajatunepew.pdfIn PDF document text
- http://biswasi.com/userfiles/files/13958451795.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=ps+vita+emulator+mobilePDF link annotation
- 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_off0000b326.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB326	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000cb3d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCB3D	10472 bytes
SHA-256: `0d62ac77b56b7d68f725bc19b5a3478610ccaa081b05ac8de86fd0cee8b31327`
`font_02_sfnt_off0000e31a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE31A	16464 bytes
SHA-256: `fa7e4d54669f0197120e53c9f81c2836122b58223b976d4c43900b9584e5a915`

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