PDF malware analysis — malicious · e605926e84920ffb

MALICIOUS

PDF

89.0 KB Created: 2021-05-31 04:24:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27

MD5: 303d7c83c1abe587ec888ebf72877e47 SHA-1: f638714faa7773e5889e6be539e236bb066e5a59 SHA-256: e605926e84920ffb894be8c6cdadf0b809737dc48bddd224d2a2404b39c6bbf5

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ClamAV detection and ML classifier strongly indicate malicious intent. The embedded URLs, such as https://soxebez.ru/123?utm_term=nmims+mumbai+summer+placement+report, are likely used to redirect users to malicious sites or download further payloads.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

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.
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://soxebez.ru/123?utm_term=nmims+mumbai+summer+placement+report PDF link annotation
- https://xafuzijinole.weebly.com/uploads/1/3/4/6/134667747/1896ed.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4459792/normal_6030657ce46dd.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4387922/normal_6023fd0c22110.pdfIn PDF document text
- https://sanakifagijegu.weebly.com/uploads/1/3/4/4/134404207/zofitafedafoz.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4393785/normal_5fdb77988c1ec.pdfIn PDF document text
- https://nuzewotamomumaf.weebly.com/uploads/1/3/4/7/134701518/45289b59dbe0fd9.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4465705/normal_604b2a6b000be.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4391314/normal_6061f4ae48523.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4489722/normal_605bea84cf767.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4379486/normal_5fcbfb279584c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4384167/normal_60103bac8f113.pdfIn PDF document text
- https://visuriteja.weebly.com/uploads/1/3/5/3/135323353/9c60bf8cb693b.pdfIn PDF document text
- https://wosiwimobej.weebly.com/uploads/1/3/1/1/131164223/lajepa-zanafiw-gejoraj.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4420451/normal_605473181bc92.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/79f09b5e-1712-4ab1-9d49-6b2f219cbb66/84115457945.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/9f877dbf-42bb-4373-8e81-e61358f27634/natonagozepowipizewizifa.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e4678836-83df-4b80-97a0-a4fbef8bc8fc/girl_with_the_dragon_tattoo_author_books.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ec7dcdb6-a031-48f1-a1c7-72d1b1ebe005/what_was_the_effect_of_congressional_reconstruction.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_off0001089c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1089C	5188 bytes
SHA-256: `9f71cf2948483cb294153c6c5ab3911a6d8f89e1d481af8e8e41770daa5d1d65`
`font_01_sfnt_off00011a28.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11A28	11480 bytes
SHA-256: `9284f3ce43506f99cdb4660260d083ed13b6be73ee7db282507f9062094ac1a8`
`font_02_sfnt_off0001416c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1416C	16164 bytes
SHA-256: `ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8`

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