PDF malware analysis — malicious · b6b619b0bb6114d9

MALICIOUS

PDF

38.3 KB Created: 2020-03-12 07:21:49 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-12-25

MD5: e2bcad1818b513a5860c6cc3111847b8 SHA-1: f0c543607cc1f9f4edaf774dfb474ec71de7019d SHA-256: b6b619b0bb6114d9bb8dcf2f17885a9c5817023c755e1cb5cc0c46458a92b583

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of embedded external links, identified as a link farm, pointing to various domains. This behavior is indicative of an attempt to manipulate search engine results or to serve malicious content through these external resources. The ML classifier strongly supports the malicious verdict.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

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 http://45t34.slpny.com/uploads/1/3/0/2/130271028/130271028.html#english+phonetic+alphabet+aviation PDF link annotation
- http://crystalwittenutrition.com/uploads/1/3/0/8/130814001/ligarogugab-bidezonafexes-refewak-gosijituzapiz.pdfIn PDF document text
- http://mssciencefest.com/uploads/1/3/0/6/130604541/9223461.pdfIn PDF document text
- http://back2hemp.com/uploads/1/3/0/4/130477890/fupunosive.pdfIn PDF document text
- http://www.shopgreenhaveneco.com/uploads/1/3/0/2/130272557/revupi.pdfIn PDF document text
- http://resistancereads.com/uploads/1/3/0/4/130476573/kilatoxitolupu.pdfIn PDF document text
- http://josephdefeo.net/uploads/1/3/0/5/130589454/mubelikasegavepip.pdfIn PDF document text
- http://weijiseafood.com/uploads/1/3/0/6/130605471/fuxovezadijamu.pdfIn PDF document text
- http://atxj.com/uploads/1/3/0/2/130272890/vipipifowulujotez.pdfIn PDF document text
- http://madelinerhodes.com/uploads/1/3/0/7/130775624/6344563.pdfIn PDF document text
- http://clarinnes.org/uploads/1/3/0/6/130639877/5819427.pdfIn PDF document text
- http://reconinspections.us/uploads/1/3/0/7/130775682/4589112.pdfIn PDF document text
- http://nicoleadriennephotography.com/uploads/1/3/0/5/130544954/2740145.pdfIn PDF document text
- http://www.7leather.net/uploads/1/3/0/4/130435820/5703d0b099393.pdfIn PDF document text
- http://shredpics.com/uploads/1/3/0/3/130313166/224fc31a61.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

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00006cdb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6CDB	8064 bytes
SHA-256: `e46945d3d0d21bf3c9365b414b40bef3220e935ecee97230bfce0eb21f5f8a6a`

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