PDF malware analysis — malicious · 2d75d38cb39e82fb

MALICIOUS

PDF

77.2 KB Created: 2021-09-18 07:56:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 28972511c20e65a3c1ff8dcfbf647ae1 SHA-1: 34c36f5da969306b93222412e8e12c41f3d105e8 SHA-256: 2d75d38cb39e82fb332bf4a3123f2670d74ffa30ddd3b758bc9bc9ef7f330ede

134 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and is flagged as malicious by ML classifiers and ClamAV. It also functions as a link farm, directing users to numerous external PDF files hosted on various domains, suggesting a distribution or phishing campaign. The presence of embedded JavaScript indicates an attempt to execute code within the document, likely to facilitate further malicious actions.

Machine Learning

Nyx PDF Classifier malicious score 0.9948

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
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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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://alotercuman.com/ckfinder/userfiles/files/bokidesazimuvu.pdf In PDF document text
- http://tao-ssct.org/data/upload/file/pozopebajibebaxerur.pdfIn PDF document text
- http://cardealer-space.com/js/upload/files/1274206850.pdfIn PDF document text
- https://atlantidegattico.it/file/fafizagupagomagi.pdfIn PDF document text
- https://implantsdentairesdesmoulins.com/upload/editor/file/vizalemix.pdfIn PDF document text
- https://shivajigrihnirman.com/singhania/downloads/file/ponedovukibane.pdfIn PDF document text
- http://cnokorea.com/userfiles/file/muxefimojovepo.pdfIn PDF document text
- https://essaidafm.com/uploads/FCK_files/file/33754976068.pdfIn PDF document text
- http://ylgems.com/file_media/file_image/file/49351443803.pdfIn PDF document text
- https://connatlas.com/home/conn/public_html/ckfinder/userfiles/files/62922004473.pdfIn PDF document text
- https://hoavily.com/uploads/files/fepopoxewadekofi.pdfIn PDF document text
- https://dadesigning.com/daduserfiles/files/gopujerizet.pdfIn PDF document text
- https://mariellatriolo.it/public/file/zosuvojonikako.pdfIn PDF document text
- https://cfbadalona.net/ckdata/files/85396930353.pdfIn PDF document text
- http://csa.china-led.net/static/editor/ckeditor/ckfinder/upfile/files/ziruwepekurugopetugijalip.pdfIn PDF document text
- http://ddservice-bmw.pl/userfiles/file/losikekeful.pdfIn PDF document text
- http://strategie-online.net/catalogue_dynamique/file/ropamimugab.pdfIn PDF document text
- https://argumentua.com/i/file/76590870185.pdfIn PDF document text
- https://sportuna.be/ckfinder/userfiles/files/zigukefebezadejumenuw.pdfIn PDF document text
- https://sharmtocairo.com/userfiles/files/naxopixufo.pdfIn PDF document text
- http://betonkeritesek.eu/Content/files/naxitoxosegogosuvawefizo.pdfIn PDF document text
- http://ottotech.center/userfiles/file/nuwuzonajobozev.pdfIn PDF document text
- http://cpgny.com/userfiles/files/fawikazetukegopinunol.pdfIn PDF document text
- https://prospr.fr/ckfinder/userfiles/files/xodugijedevuwemetepoxakoj.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=grand+theft+auto+v+apk+download+for+androidPDF 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_off0000ca7b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCA7B	16964 bytes
SHA-256: `0e81f73affaa3a603c2df4464a048185b0bbb4ded5e5fe2402becb81e13c9d6d`
`font_01_sfnt_off0000f609.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF609	10808 bytes
SHA-256: `1b864dcb24426fd948afb55870b9450064a397e011ea327bb8a5f8afea51d74e`
`font_02_sfnt_off00010eea.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10EEA	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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