PDF malware analysis — malicious · 8710e9ae27cfddd4

MALICIOUS

PDF

72.0 KB Created: 2020-12-26 00:19:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14

MD5: dc74e3aec2552b73c42ce143dd0550c5 SHA-1: 1fcd108d3668a142797f0f17519481a7f2078454 SHA-256: 8710e9ae27cfddd45361859519b13655572e2a5de5e2943913e8315e9cc76d0d

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a high number of external links, indicating a link farm or SEO spamming attempt. The embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' strongly suggest this malicious intent. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

Heuristics 4

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://trafffi.ru/123?utm_term=syncsort+manual+mainframe+pdf PDF link annotation
- https://dudererojafa.weebly.com/uploads/1/3/4/3/134362298/f9b6f958f9.pdfIn PDF document text
- https://cdn.sqhk.co/jebixusugak/sic2Eje/how_to_raise_a_gifted_child_book.pdfIn PDF document text
- https://xamorodedas.weebly.com/uploads/1/3/4/7/134714841/sewolipugu.pdfIn PDF document text
- https://zujamabosav.weebly.com/uploads/1/3/4/3/134363941/9449862.pdfIn PDF document text
- https://guditeni.weebly.com/uploads/1/3/4/5/134529862/a1dea28f91f3a.pdfIn PDF document text
- https://xoxujodega.weebly.com/uploads/1/3/4/3/134363828/tilavimefota_daxebivu.pdfIn PDF document text
- https://cdn.sqhk.co/xivumatozo/ihEhbic/62411333985.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- https://uploads.strikinglycdn.com/files/df1e53da-2d7f-4d81-84f5-a8d4d872184b/vipisezez.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/c95577b5-1d41-469b-ba2d-f3cc98189e32/93334280331.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000cb12.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCB12	5388 bytes
SHA-256: `9b9d66a619e8113f4fbe27235cf5c7f9161fbe09a1631130c8a410c44238c86f`
`font_01_sfnt_off0000dd45.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDD45	11824 bytes
SHA-256: `441bb171cf4184a692370fe876ff45b8d875e8b6083cd015c64e28631a795086`
`font_02_sfnt_off0001055b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1055B	4324 bytes
SHA-256: `9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2`

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