PDF malware analysis — malicious · 50eda064dbed8b5b

MALICIOUS

PDF

75.0 KB Created: 2021-05-23 09:43:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14

MD5: 22bf83827572ed70600f9258cdb4e3ca SHA-1: dc1f97ec29cfe4182af99c72a04541ad20a8a6fc SHA-256: 50eda064dbed8b5b242aa8b2a887cf0dec5c93dda36132be8ae6bc280d2a69d7

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a high number of external links, with one prominent URL pointing to a suspicious domain ('jacksth.ru'). ClamAV detection and ML classification strongly indicate malicious intent, likely related to phishing or malware delivery. The presence of a 'download' lure further supports this, suggesting the document is designed to trick users into clicking malicious links.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://jacksth.ru/strik?utm_term=free+sda+hymnal+book+download PDF link annotation
- https://static.s123-cdn-static.com/uploads/4370071/normal_6002d52b87a8c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4453563/normal_604ee02c26702.pdfIn PDF document text
- https://fitarerak.weebly.com/uploads/1/3/5/3/135313257/94332.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4420451/normal_5fcc269bbc1d7.pdfIn PDF document text
- https://pememeva.weebly.com/uploads/1/3/0/8/130874233/mudiv.pdfIn PDF document text
- https://dadekubezaxinis.weebly.com/uploads/1/3/2/7/132740399/5ab5c3.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4458852/normal_604dc314d7997.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4467915/normal_602ac417a70c0.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/vokeri/18560224023.pdfIn PDF document text
- https://s3.amazonaws.com/pafexegud/sylvia_day_crossfire_series_kindle.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b525d47c-9ee9-4310-8c03-26ed4f15ac7a/how_to_do_hanging_indent_on_google_docs_powerpoint.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/05f0e919-88ca-4838-bd54-4e4ffa502d2e/kitchenaid_electric_range_burner_not_working.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d4c48728-9b13-45e1-bbd8-3189318be341/58940942292.pdfIn PDF document text
- https://s3.amazonaws.com/xirixepo/janevonelo.pdfIn PDF document text
- https://s3.amazonaws.com/kuxegu/geophagus_care_sheet.pdfIn PDF document text
- https://s3.amazonaws.com/bamepofewalada/12691014066.pdfIn PDF document text
- https://s3.amazonaws.com/tinivukedeta/37955626287.pdfIn PDF document text
- https://s3.amazonaws.com/baxekojojexusol/what_does_annual_interest_rate_mean.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/39913ed9-90d3-4158-87c3-38ffbd316eed/elements_of_good_film_production.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/46b4c513-d7ad-4be8-8a4d-24cf03b91ea2/66380300583.pdfIn PDF document text
- https://s3.amazonaws.com/fewifuwu/jepixozazojumuwujafupuwiz.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://scripts.sil.org/OFLIn 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_off0000d140.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD140	5416 bytes
SHA-256: `060d285952533a8eec9ab0c0a32c11d165fbbd961d930986580a401b1a770438`
`font_01_sfnt_off0000e396.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE396	10664 bytes
SHA-256: `84dc6b46d2c23c93313eade7bd9d9f255a5286789a87889209f4f1bf32dce99e`
`font_02_sfnt_off0001080d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1080D	16504 bytes
SHA-256: `19a73e1d8f68f9a24e8dc44a2078183571bf4d8ac7397d023a8836ae4a4ee1c7`

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