PDF malware analysis — malicious · 95422856e41117f7

MALICIOUS

PDF

74.9 KB Created: 2021-09-30 12:37:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 222422bf35a6dac17111266964c0fe0b SHA-1: 83a5d2a98e9f3b0bcb234170e12b31ccc3fbd61c SHA-256: 95422856e41117f7cdf8e75b2e125ffad5391a4e57c9fd58e80d4082ff66ef3e

66 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs pointing to various PDF files hosted on different domains, indicative of a link farm. The ML classifier strongly flagged this PDF as malicious. While no scripts were extracted, the structure and the high number of external links suggest an attempt to manipulate search engine results or distribute further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

Heuristics 4

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://dynasty888.com/image/files/20210928_000520.pdf In PDF document text
- https://krishnacock.com/userfiles/file/xosugukivujexebofipo.pdfIn PDF document text
- http://jocoseatee.com/userfiles/files/tufapulivila.pdfIn PDF document text
- https://globalcareerclub.com/FCKeditor/userfiles/file/wadekaragelatebezibajam.pdfIn PDF document text
- https://aawyx.com/sites/default/imageuser/file/49834655812.pdfIn PDF document text
- http://gaushalango.com/uploaded_files/userfiles/files/fewurisezuzalibomodulit.pdfIn PDF document text
- http://rescue119.org/userfiles/file/rumonurataj.pdfIn PDF document text
- https://yuanfuconstruction.com/ckfinder/upload/files/futusulejaje.pdfIn PDF document text
- http://novafish.it/userfiles/files/kopadadoke.pdfIn PDF document text
- http://vincitydata.com/uploads/ckfinder/files/falifemonidigez.pdfIn PDF document text
- https://aiaciran.org/cache/fck_files/file/lavetibelop.pdfIn PDF document text
- http://poliinc.com/upload/files/fufutekuzevuwegogika.pdfIn PDF document text
- http://agroanaliz.by/upload/editor/files/35537990259.pdfIn PDF document text
- https://cpsguffanti.it/uploads/file/sadirotupikupun.pdfIn PDF document text
- http://220-wm01.netdbhosting.com/file/99359902453.pdfIn PDF document text
- http://nasledie-sluck.by/var/upload/file/79523918586.pdfIn PDF document text
- http://bjqyms.com/filespath/files/20210903225901.pdfIn PDF document text
- https://almuhja.com/ckfinder/userfiles/files/rojarewalixufiteva.pdfIn PDF document text
- http://jarauwerdaenzn.nl/userfiles/file/25239465576.pdfIn PDF document text
- http://mywayrtk.info/userfiles/file/40838897658.pdfIn PDF document text
- http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161541484ad055---xufopijobowuwidurabuvewa.pdfIn PDF document text
- http://jcbcharpentebois.com/ressource/site-image/files/29189458944.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=clash+of+clans+jailbreak+hackPDF 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_off0000bf3c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBF3C	17728 bytes
SHA-256: `ffcf49a142c7857180c9a7ccbec20c2097092be5e9013fb45bbc04d8b64520a2`
`font_01_sfnt_off0000ed40.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xED40	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00010557.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10557	10728 bytes
SHA-256: `d6677d5d8a15fa3c298a1f0fc1168d9ceff2e03f51dc184e7aaebf2f8fa499ac`

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