PDF malware analysis — malicious · cc03c6d1798d7c5f

MALICIOUS

PDF

124.1 KB Created: 2021-03-09 18:07:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22

MD5: 3ce3a52c2b3b7057c37eb06518f353b2 SHA-1: 380de5fd7d6b5cb6493bc877bd8e1942859d8bf0 SHA-256: cc03c6d1798d7c5f6d717b914a2397684dad03d4104f7612a25fff611c5d1ca4

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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.
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://vilenefex.ru/strik?utm_term=one+punch+man+season+1+sampai+berapa+episode PDF link annotation
- https://pazudafodimaje.weebly.com/uploads/1/3/0/7/130776249/ruvovulumudeperijolu.pdfIn PDF document text
- https://nugobobunebiset.weebly.com/uploads/1/3/5/3/135303429/6772435.pdfIn PDF document text
- https://pegofugetil.weebly.com/uploads/1/3/5/3/135347090/pofipetowigaj.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4444104/normal_602b3ab52e9f3.pdfIn PDF document text
- https://wixalotoduf.weebly.com/uploads/1/3/5/3/135305273/ae09aae62497.pdfIn PDF document text
- https://gozaperirij.weebly.com/uploads/1/3/1/1/131163841/5287780.pdfIn PDF document text
- https://cdn.sqhk.co/tefaxobaf/hchahi7/seven_codes_of_bushido.pdfIn PDF document text
- https://kagebavewijove.weebly.com/uploads/1/3/0/7/130740568/51380bec317ff8.pdfIn PDF document text
- https://wurokilusonopos.weebly.com/uploads/1/3/5/3/135345649/bfec32a373.pdfIn PDF document text
- https://baputopozim.weebly.com/uploads/1/3/5/3/135336161/1279162.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4411245/normal_5fe2afc37bb76.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4391954/normal_5ffd0c0621d7a.pdfIn PDF document text
- https://cdn.sqhk.co/javabufe/gijbAyj/calories_2_sheets_lasagna.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/8136782b-6ac4-4401-86fe-c6c695d72a95/mazaditakolobaditona.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/4880593e-8b62-4f64-899e-7991466318e8/microsoft_excel_meaning_and_uses.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/475e27af-86ec-4411-b20e-dd7953333c7f/22157253169.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/529ce34c-1aaf-4af4-80e1-4e7d38836cdc/mubokadoterag.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/31f14e66-86fc-41ef-9b73-4fe6659d6d44/73434158520.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_003_off000124ee.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x124EE	35036 bytes
SHA-256: `e8bef9c59b5cea12f3324dfb6580bb9587b2f00df3aff4117283bf38b5b7df1a`
`font_01_sfnt_off0001919b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1919B	5500 bytes
SHA-256: `d718d4702f066691272ac5cc573fc01d8e5eccc1c249750ddc8b4251384c50db`
`font_02_sfnt_off0001a40d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1A40D	5068 bytes
SHA-256: `d530ddac0863fc1707f52d72d0610c54499af4f2d721a3867e6e0657ccd723a4`
`font_03_sfnt_off0001b6bd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1B6BD	13588 bytes
SHA-256: `e907b889e4d6fae1cfc4a37ef457c07db12d7788dff3af2791e940d59b899702`

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