PDF malware analysis — malicious · 7bfd74a800c89bf4

MALICIOUS

PDF

74.5 KB Created: 2021-09-16 10:26:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: a6c951a08d2f57720c41a9c26b7b2517 SHA-1: f3cc2c9382c9c9c9d03e6d960b580f252d712588 SHA-256: 7bfd74a800c89bf41417e8e340a92482e3fe8b0a9a6bedbbc96125960fee9ff8

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs pointing to disposable hosting, suggesting a link farm or phishing lure. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's designed to redirect users to malicious external sites, likely as part of a phishing campaign or to download further payloads.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

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://philabc.ru/uplcv?utm_term=shadow+fight+hack+version+2 PDF link annotation
- https://combrooncom.com/contents/files/54920921814.pdfIn PDF document text
- https://machinex-machines.com/UserFiles/File/56304150309.pdfIn PDF document text
- https://sanvexe.vn/webroot/img/files/nadutexubokawomome.pdfIn PDF document text
- http://spc1991.com/ckfinder/userfiles/files/wizugafipokugelo.pdfIn PDF document text
- http://radissonhoteltraining.com/userfiles/file/tupulojajemivafej.pdfIn PDF document text
- https://fotofidelity.cz/userfiles/file/kadedugodokixuvetuke.pdfIn PDF document text
- https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a06c1475d4---dijewewewuvikegumudifajov.pdfIn PDF document text
- https://alkalacarservice.com/public_html/userfiles/file/vilireteteboba.pdfIn PDF document text
- http://edwardfmcgintypa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gomojat.pdfIn PDF document text
- http://travel-door.com/userfiles/file/7673422973.pdfIn PDF document text
- https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/266ef29875e97c1dee19d85782e29795/36272636388.pdfIn PDF document text
- https://www.ksmt.edu.np/assets/ckfinder/userfiles/files/25809078015.pdfIn PDF document text
- https://bepxuyenviet.com/upload/files/karevadakozo.pdfIn PDF document text
- http://meubelenindex.nl/images/uploads/43122308571.pdfIn PDF document text
- http://ahjygjg.com/upload_fck/file/2021-9-10/20210910165548287619.pdfIn PDF document text
- https://anyimaker.com/upload/users/files/wovitilojabofarek.pdfIn PDF document text
- https://qwert5.com/psum/admin/userfiles/file/37262097946.pdfIn PDF document text
- http://unitez.net/images/newtech/files/60828664221.pdfIn PDF document text
- https://reviewz.eu/app/webroot/files/userfiles/files/ziveb.pdfIn PDF document text
- https://cobaltinc.org/userfiles/file/ruzativarujisafilesipuji.pdfIn PDF document text
- http://sentai.cc/data/file/20210906_085144_143.pdfIn PDF document text
- https://chowdhurytourism.com/ckfinder/userfiles/files/zulujifa.pdfIn PDF document text
- https://artedeeducar.com.br/ckfinder/userfiles/files/doxivegelab.pdfIn PDF document text
- https://cet.sk/res/file/gagizerajisizezoxoba.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_off0000be69.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBE69	11148 bytes
SHA-256: `0b01876a6260634a0f73778040ea9527a95d40126abb0ee6fe14189a95236e7f`
`font_01_sfnt_off0000d857.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD857	17136 bytes
SHA-256: `09ab662a070f3ea60a8a58c33fcaadc1453ff35dd51c04332c0aa27e0e155b65`
`font_02_sfnt_off000104ca.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x104CA	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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