PDF malware analysis — malicious · 84cf1b06a58f85e2

MALICIOUS

PDF

96.4 KB Created: 2021-10-05 13:45:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25

MD5: 50d8238187a9047e4b19b3822cee3025 SHA-1: 0d7590666460114f72cdd1f0369cd2118b70f30d SHA-256: 84cf1b06a58f85e2139f54906b4de8447da6f9e137ed542562d06b056aef5166

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample was flagged by multiple heuristics, including a critical ClamAV detection and a high ML score, indicating malicious intent. The presence of embedded JavaScript and a large number of external URIs, many pointing to disposable hosting, suggests the PDF is designed to redirect users to malicious sites. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic specifically points to a link farm strategy, likely for phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9969

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 https://medvor.ru/uplcv?utm_term=how+long+can+toads+live+without+food PDF link annotation
- http://vps73.juicy-group.com/editor_upload_image/file/feretapedisenofukimim.pdfIn PDF document text
- http://amblesidewindermere.ca/fckuploads/images/file/46257420422.pdfIn PDF document text
- http://citygclub.com/ckupload/files/zejejusufetixamepiwiwezax.pdfIn PDF document text
- http://ucg-eg.com/userfiles/file/48514836638.pdfIn PDF document text
- https://dichvumoinoi.com/ckfinder/userfiles/files/60252189518.pdfIn PDF document text
- http://xn--j1aai7d.xn--p1ai/userfiles/file/61060932538.pdfIn PDF document text
- http://oroblupiscine.it/userfiles/files/42209738698.pdfIn PDF document text
- http://tinhotsaigon.com/uploads/files/79759315006.pdfIn PDF document text
- https://partroyfuneralhome.com/partroy/assets/file/58666711482.pdfIn PDF document text
- http://bobiniauto.com/userfiles/file/dokokufufonanewulosozupa.pdfIn PDF document text
- http://metapolar.hu/tmp/26694474024.pdfIn PDF document text
- https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/16133fff3bfad5---42166865789.pdfIn PDF document text
- https://obermeyer-modemarkt.de/upload/file/redosojoreniveto.pdfIn PDF document text
- http://rnralpha.cz/res/file/85744097120.pdfIn PDF document text
- http://www.haztartasigepszakuzlet.hu/pics/file/4767916533.pdfIn PDF document text
- https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1615598fcece23---2860368953.pdfIn PDF document text
- http://capitaldanceacademy.com/userfiles/files/64610901656.pdfIn PDF document text
- https://horizontire.com/userfiles/file/67884028121.pdfIn PDF document text
- http://avstralianature.ru/ckfinder/userfiles/files/wulabusuku.pdfIn PDF document text
- http://chongros.com/userData/board/file/lawitoletibawuwamapa.pdfIn PDF document text
- http://carscaso.com/js/upload/files/75468587214.pdfIn PDF document text
- https://cowik.pl/upload/xewetifogawolagugupafono.pdfIn PDF document text
- http://nelly-design.ru/upload/files/fomozunovukifoma.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_off000110cd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x110CD	19076 bytes
SHA-256: `319070db2e730d5c312f2cb8a4be6a760e949036f09a451e723e06ce3c5d650d`
`font_01_sfnt_off000142b5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x142B5	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00015acc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x15ACC	10896 bytes
SHA-256: `dd74090f96ebd26109757f4849f742179a11902638247063aa171323be44c2d6`

Open this report in the interactive analyzer, or submit your own file for analysis.