PDF malware analysis — malicious · 744d43550c383f77

MALICIOUS

PDF

91.1 KB Created: 2021-06-08 17:40:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25

MD5: 259006a5c26fe1b4c4976845d1abc700 SHA-1: cf4f2c4c7b41ebad1500ca037499dba34ff661bf SHA-256: 744d43550c383f777350856cb6c0d6fc07feeb264e77aa7af8c44b76293dd064

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains numerous external links, including one to 'smidgel.ru', suggesting a link farm or phishing attempt. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' indicate the document's primary purpose is to redirect users to external sites, likely for malicious purposes.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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.
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://smidgel.ru/pbw?utm_term=typewriter+effect+premiere+pro+presets+free PDF link annotation
- https://cdn-cms.f-static.net/uploads/4408463/normal_602fda18ecb97.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4417319/normal_5fcf7e2616f34.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4450419/normal_5fe2bb49cf7a1.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4387589/normal_6058e67b24283.pdfIn PDF document text
- https://wadabugijiri.weebly.com/uploads/1/3/0/8/130873870/zizam-dejim-gevirixupaju.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4478398/normal_6052ccaf8d2e3.pdfIn PDF document text
- https://tixusevonatafix.weebly.com/uploads/1/3/4/6/134611731/gadadenerora.pdfIn PDF document text
- https://rumunalitivera.weebly.com/uploads/1/3/4/0/134041361/0e8c35784d.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4489257/normal_5ffd3749effcd.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/bea89a63-d4e2-45c5-b80d-49037580f597/60277622971.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/477d3aa1-19be-4d20-bab2-e5ccc10c5eba/mercruiser_4.3_tks_carburetor_cleaning.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/babe58ac-4b87-47d9-be88-ab4a70ff6649/tabla_de_formulas_de_areas_y_volumenes.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f37af93a-4311-40e2-8e7f-1df963af814d/64000463091.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8d67e2aa-2fe3-45fd-b095-1875b84db95c/what_is_the_plot_of_harry_potter_and_the_cursed_child.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3728978a-d978-44bd-a511-dc194ce19381/xusatevowesep.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/6479f411-5758-4a60-8114-dece03ede091/13023478673.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/0e20225d-9a95-42d7-b2c4-af00eb234b4b/motorola_xtl5000_vhf.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/7aad42e4-4cbf-4804-868b-71010f218563/wexunutaxilaku.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/400ed9dd-0f10-4a07-b380-6bbacc84750c/how_to_write_30_thousandths_in_decimal_form.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
- https://www.youtube.com/channel/UCUoq7RijwRS9HiM3rXsf1kwIn PDF document text
- https://vk.com/youtube.vIn 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f9e4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF9E4	5064 bytes
SHA-256: `72d792f7d2ddb36fa7ca3c46f00a136599588257e8f7c4a27004c0e8e908d675`
`font_01_sfnt_off00010b23.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10B23	1928 bytes
SHA-256: `fa7993791cc011362660fbd4a5dece3382dbb5f843bb92cd1a6751d877a7b5ad`
`font_02_sfnt_off00011457.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11457	13960 bytes
SHA-256: `c7751056ecf813df5cbb7f5f1db54f7dcba19b89b4d32e7c41e4a2c7d454b053`
`font_03_sfnt_off0001413d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1413D	17764 bytes
SHA-256: `769fda760d5b02fc68529669498a07048612ab7d363a0d72499b0237ec74f609`

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